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502 Bad Gateway求数学大神指点！求过程！_百度知道
求数学大神指点！求过程！
已知xⁿ=4,yⁿ=¼,求(x²y³)ⁿ的值！要过程！急！！！！
提问者采纳
已知xⁿ=4,yⁿ=¼,求(x²y³)ⁿ．求(x²y³)ⁿ的值． (x²y³)ⁿ=x²ⁿy³ⁿ=4²×(1/4)³=4²×(1/4)²×1/4=1/4
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其他4条回答
(x²y³)ⁿ= （xⁿ）²乘以（y ⁿ ）³=4²×（¼）³= ¼求选，谢谢
(x²y³)ⁿ=（xⁿ）² × （yⁿ）³
=4²×（¼）³
(x²y³)ⁿ=1/4
d55s12a5166551
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出门在外也不愁: Unicode Entity Codes for Math
Unicode Entity Codes for Math
section to see how they are implemented.
External Links
Information on this page was taken from these sources and may include additional informaiton not available on this page.
(Jukka Korpela)
(Scroll to Number 2000 and beyond)
Common Arithmetic & Alebgra
-- means no HTML entity code exists and that a numeric code must be used.
Codes for Common Math Symbols
Character Name
GREATER THAN&
LESS THAN OR EQUAL TO
GREATER THAN OR EQUAL TO
PLUS OR MINUS
NOT EQUALS
DIVISION SIGN
DIVISION SLASH
FRACTION SLASH
SQUARE ROOT RADICAL
FOURTH ROOT
ALEF INFINITY SYMBOL
FUNCTION ITALIC F
PRIME (single quote)
DOUBLE PRIME (double quote)
TRIPLE PRIME (triple quote)
THEREFORE (Triangular Dots)
DOT OPERATOR
SUPERSCRIPT TWO
SUPERSCRIPT TWO
SUPERSCRIPT THREE
LEFT ANGLE BRACKET
RIGHT ANGLE BRACKET
LEFT CEILING BRACKET
RIGHT CEILING BRACKET
LEFT FLOOR BRACKET
RIGHT FLOOR BRACKET
CIRCLED PLUS (Direct Sum)
CIRCLED TIMES (Vector Product)
Superscript and Subscript
With the Tags
You can use the &sup&&/sup& tag to create superscript text and &sub&&/sub& to create su-script text. Or you can use the codes below.
Code: x&sup&x+1&/sup&
Result: xx+1
Code: x&sub&i+1&/sub&
Result: xi+1
With the Codes
Code: x²
Result: x²
Code: x⁴
Result: x⁴
Superscript Chart
Codes for Superscript Characters
Character Name
SUPERSCRIPT ZERO
SUPERSCRIPT ONE
Entity Code = ¹
SUPERSCRIPT TWO
Entity Code = ²
SUPERSCRIPT THREE
Entity Code = ³
SUPERSCRIPT FOUR
SUPERSCRIPT FIVE
SUPERSCRIPT SIX
SUPERSCRIPT SEVEN
SUPERSCRIPT EIGHT
SUPERSCRIPT NINE
SUPERSCRIPT PLUS SIGN
SUPERSCRIPT MINUS
SUPERSCRIPT EQUALS SIGN
SUPERSCRIPT LEFT PARENTHESIS
SUPERSCRIPT RIGHT PARENTHESIS
SUPERSCRIPT LATIN SMALL LETTER I
SUPERSCRIPT LATIN SMALL LETTER N
Subscript Codes
Codes for Subscript Characters
Character Name
SUBSCRIPT ZERO
SUBSCRIPT ONE
SUBSCRIPT TWO
SUBSCRIPT THREE
SUBSCRIPT FOUR
SUBSCRIPT FIVE
SUBSCRIPT SIX
SUBSCRIPT SEVEN
SUBSCRIPT EIGHT
SUBSCRIPT NINE
SUBSCRIPT PLUS SIGN
SUBSCRIPT MINUS
SUBSCRIPT EQUALS SIGN
SUBSCRIPT LEFT PARENTHESIS
SUBSCRIPT RIGHT PARENTHESIS
LATIN SUBSCRIPT SMALL LETTER A
LATIN SUBSCRIPT SMALL LETTER E
LATIN SUBSCRIPT SMALL LETTER O
LATIN SUBSCRIPT SMALL LETTER I
LATIN SUBSCRIPT SMALL LETTER R
LATIN SUBSCRIPT SMALL LETTER U
LATIN SUBSCRIPT SMALL LETTER V
LATIN SUBSCRIPT SMALL LETTER X
GREEK SUBSCRIPT SMALL LETTER BETA
GREEK SUBSCRIPT SMALL LETTER GAMMA
GREEK SUBSCRIPT SMALL LETTER RHO
GREEK SUBSCRIPT SMALL LETTER PHI
GREEK SUBSCRIPT SMALL LETTER CHI
Superscript and Subscript
Check these references for other methods to implement superscript/subscript and extra fractions
These codes allow fractions to be represented with typographically smaller numerators and denominators, but they can be replaced by other ways of typing a fraction (e.g. &1/2&). CSS Styling can also be used to achieve the same effect as described on
Note: The code -- means no HTML entity code exists and that a numeric code must be used.
Codes for Fracctions
Character Name
VULGAR FRACTION 1/4
VULGAR FRACTION 1/2
VULGAR FRACTION 3/4
VULGAR FRACTION 1/3
VULGAR FRACTION 2/3
VULGAR FRACTION 1/5
VULGAR FRACTION 2/5
VULGAR FRACTION 3/5
VULGAR FRACTION 4/5
VULGAR FRACTION 1/6
VULGAR FRACTION 5/6
VULGAR FRACTION 1/8
VULGAR FRACTION 3/8
VULGAR FRACTION 5/8
VULGAR FRACTION 7/8
Common Statistics
-- means no HTML entity code exists and that a numeric code must be used.
Codes for Statistics Symbols
Character Name
LOWER CASE MU (Mean)
LOWER CASE SIGMA (Standard Deviation)
LOWER CASE CHI
CAPITAL SIGMA N-ARY SUMMATION
CAPITAL PI N-ARY PRODUCT
N-ARY COPRODUCT (upside down capital pi)
X-Bar, P-Hat and D-Bar
Some codes like that for x? (X-bar) are actually a combination of two codes - the base letter x plus a code for the line above (&#772: or &&̄). Note that a capital letter (e.g. the D in D-bar) may need to be reduced in size to accomodate the placement of the combining diacritic.
Note: These symbols use combining characters and may not appear correctly in older browsers such as Safari 2.
Statistics Symbols using Combining Diacritics
Character Name
X-Bar (Average)
&span style=&font-size:80%&&D&/span&̄
Measurement Symbols
Common Symbols
Codes for Measurement Symbols
Character Name
DEGREE SYMBOL
MICRO MU SYMBOL
SINGLE PRIME (feet, degree minutes)
DOUBLE PRIME (inches, degree minutes)
PER MILLE (1/1000th)
Common Calculus Entity Codes
Codes for Calculus Symbols
Character Name
PARTIAL DIFFERENTIAL
INCREMENT (Difference or capital Delta)
NABLA (Backward Difference, Grad or upside down triangle)
Additional Integral Symbols
These symbols have numeric entity codes only.
Additional Calculus Symbols
Character Name
DOUBLE INTEGRAL
TRIPLE INTEGRAL
QUADRUPLE INTEGRAL
CONTOUR INTEGRAL
SURFACE INTEGRAL
VOLUME INTEGRAL
CLOCKWISE INTEGRAL
ANTICLOCKWISE INTEGRAL
CLOCKWISE CONTOUR INTEGRAL
ANTICLOCKWISE CONTOUR INTEGRAL
Letter Symbols
Common Letter Symbols
Character Name
(Sideways 8)
ALEF INFINITY SYMBOL
WEIERSTRASS POWER SET (Script Capital P)
IMAGINARY Part
(Blackletter I)
REAL NUMBER
(Blackletter R)
DOUBLE-STRUCK REAL NUMBER
(Doublestruck&R)
COMPLEX NUMBERS
(Doublestruck&C)
NATURAL NUMBERS (Doublestruck&N)
PRIME NUMBERS (Doublestruck&P)
RATIONAL NUMBERS (Doublestruck&Q)
INTEGERS (Doublestruck&Z)
Logic & Set Theory
-- means no HTML entity code exists and that a numeric code must be used.
Codes for Logic and Set Theory Symbols
Character Name
FOR ALL (Upside-down A)
COMPLEMENT (Thin C)
THERE EXISTS (Backwards E)
THERE DOES NOT EXIST (Backwards E with slash)
EMPTY SET (O slash)
NOT SYMBOL (Corner)
TILDE (Alternate Not Symbol)
LOGICAL AND (Wedge or Upside down V Symbol)
LOGICAL OR (V Symbol)
INTERSECTION (Cap or Upside Down U)
UNION (Cup or U Symbol)
ELEMENT OF
NOT AN ELEMENT OF
SMALL ELEMENT OF
CONTAINS AS MEMBER
DOES NOT CONTAIN AS MEMBER
SMALL CONTAINS AS MEMBER
SUBSET OF (Sideways U with cap to left)
SUPERSET OF (Sideways U with cap to right)
NOT A SUBSET OF (Subset with Slash)
NOT A SUPERSET OF (Superset with slash)
SUBSET OF OR EQUAL TO (Subset with line below)
SUPERSET OF OR EQUAL TO (Superset with line below)
NEITHER A SUBSET OF NOR EQUAL TO
NEITHER A SUPERSET OF NOR EQUAL TO
SUBSET OF WITH NOT EQUAL TO
SUPERSET OF WITH NOT EQUAL TO
DIAMOND OPERATOR
(Possibility)
ASYMPTOTICALLY EQUAL TO
One to one Correspondence
NOT ASYMPTOTICALLY EQUAL TO
MULTISET (U with arrow)
MULTISET MULTIPLICATION (U with dot in center)
MULTISET UNION (U with plus in center)
DOUBLE SUBSET
DOUBLE SUPERSET
DOUBLE INTERSECTION
DOUBLE UNION
N-ARY LOGICAL AND
N-ARY LOGICAL OR
N-ARY INTERSECTION/td&
N-ARY UNION
CURLY LOGICAL OR
CURLY LOGICAL AND
CIRCLED PLUS (Direct Sum)
CIRCLED TIMES (Vector Product)
CIRCLED MINUS
CIRCLED DIVISION SLASH
Other Element Of Symbols
Character Name
Variants of Element of Symbols
ELEMENT OF WITH LONG HORIZONTAL STROKE
ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
SMALL ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
ELEMENT OF WITH DOT ABOVE
ELEMENT OF WITH OVERBAR
SMALL ELEMENT OF WITH OVERBAR
ELEMENT OF WITH UNDERBAR
ELEMENT OF WITH TWO HORIZONTAL STROKES
CONTAINS WITH LONG HORIZONTAL STROKE
CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
SMALL CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
CONTAINS WITH OVERBAR
SMALL CONTAINS WITH OVERBAR
NOTATION BAG MEMBERSHIP
Geometric Symbols
Note: The entity code for the Angle Symbol (&) is ∠ and the code for the perpendicular angle (&) is &.
Otherwise, these symbols have numeric codes only.
Angles and Lines
Codes for Angle/Line Symbols
Character Name
RIGHT ANGLE
Entity Code = &
MEASURED ANGLE
SPHERICAL ANGLE
DOES NOT DIVIDE
PARALLEL TO
NOT PARALLEL TO
RIGHT ANGLE WITH ARC
RIGHT TRIANGLE
UP TACK (Perpendicular)
Entity Code = &
RIGHT TACK
Logical Proofs
Note: The entity code for the Therefore Symbol (∴) is ∴. Otherwise, these symbols have numeric codes only.
Codes for Symbols in Proofs
Character Name
THEREFORE (Triangular Dots)
Entity Code = ∴
BECAUSE (Upside down Triangular Dots)
PROPORTIONAL TO
Entity Code = ∝
END OF PROOF (solid rectangle)
Common Equivalence and Proportion Operators
Common Equivalence Operators
Codes for Equivalence Statements (e.g. Not Equals)
Character Name
NOT EQUALS
APPROXIMATELY EQUAL
ALMOST EQUAL (ASYMPTOTIC)
NOT ALMOST EQUAL TO
TILDE SIMILAR TO
IDENTICAL TO
(three lines)
NOT IDENTICAL TO
Other Equivalence Symbols
More Equivalence Symbols
Character Name
STRICTLY EQUIVALENT TO
NOT IDENTICAL TO
LESS-THAN OVER EQUAL TO
GREATER-THAN OVER EQUAL TO
LESS-THAN BUT NOT EQUAL TO
GREATER-THAN BUT NOT EQUAL TO
MUCH LESS-THAN
MUCH GREATER-THAN
NOT EQUIVALENT TO
NOT LESS-THAN
NOT GREATER-THAN
NEITHER LESS-THAN NOR EQUAL TO
NEITHER GREATER-THAN NOR EQUAL TO
LESS-THAN OR EQUIVALENT TO
GREATER-THAN OR EQUIVALENT TO
NEITHER LESS-THAN NOR EQUIVALENT TO
NEITHER GREATER-THAN NOR EQUIVALENT TO
LESS-THAN OR GREATER-THAN
GREATER-THAN OR LESS-THAN
NEITHER LESS-THAN NOR GREATER-THAN
NEITHER GREATER-THAN NOR LESS-THAN
MINUS TILDE
ASYMPTOTICALLY EQUAL TO
NOT ASYMPTOTICALLY EQUAL TO
APPROXIMATELY BUT NOT ACTUALLY EQUAL TO
NEITHER APPROXIMATELY NOR ACTUALLY EQUAL TO
NOT ALMOST EQUAL TO
ALMOST EQUAL OR EQUAL TO
TRIPLE TILDE
ALL EQUAL TO
Other Mathematical Symbols
These symbols have numeric codes only.
Math Symbol Codes
Character Name
Hex Entity
MINUS-OR-PLUS SIGN
ASTERISK OPERATOR
RING OPERATOR
BULLET OPERATOR
PROPORTIONAL TO
PROPORTION
GEOMETRIC PROPORTION
HOMOTHETIC
TILDE OPERATOR
REVERSED TILDE
INVERTED LAZY S
WREATH PRODUCT
EQUIVALENT TO
GEOMETRICALLY EQUIVALENT TO
DIFFERENCE BETWEEN
APPROACHES THE LIMIT
GEOMETRICALLY EQUAL TO
APPROXIMATELY EQUAL TO OR THE IMAGE OF
IMAGE OF OR APPROXIMATELY EQUAL TO
COLON EQUALS
EQUALS COLON
RING IN EQUAL TO
RING EQUAL TO
CORRESPONDS TO
EQUIANGULAR TO
STAR EQUALS
DELTA EQUAL TO
EQUAL TO BY DEFINITION
MEASURED BY
QUESTIONED EQUAL TO
PRECEDES OR EQUAL TO
SUCCEEDS OR EQUAL TO
PRECEDES OR EQUIVALENT TO
SUCCEEDS OR EQUIVALENT TO
DOES NOT PRECEDE
DOES NOT SUCCEED
SQUARE IMAGE OF
SQUARE ORIGINAL OF
SQUARE IMAGE OF OR EQUAL TO
SQUARE ORIGINAL OF OR EQUAL TO
SQUARE CAP
SQUARE CUP
CIRCLED PLUS
CIRCLED MINUS
CIRCLED TIMES
CIRCLED DIVISION SLASH
CIRCLED DOT OPERATOR
CIRCLED RING OPERATOR
CIRCLED ASTERISK OPERATOR
CIRCLED EQUALS
CIRCLED DASH
SQUARED PLUS
SQUARED MINUS
SQUARED TIMES
SQUARED DOT OPERATOR
TRIPLE VERTICAL BAR RIGHT TURNSTILE
DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE
DOES NOT PROVE
DOES NOT FORCE
NEGATED DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE
PRECEDES UNDER RELATION
SUCCEEDS UNDER RELATION
NORMAL SUBGROUP OF
CONTAINS AS NORMAL SUBGROUP
NORMAL SUBGROUP OF OR EQUAL TO
CONTAINS AS NORMAL SUBGROUP OR EQUAL TO
ORIGINAL OF
HERMITIAN CONJUGATE MATRIX
INTERCALATE
DIAMOND OPERATOR
DOT OPERATOR
STAR OPERATOR
DIVISION TIMES
LEFT NORMAL FACTOR SEMIDIRECT PRODUCT
RIGHT NORMAL FACTOR SEMIDIRECT PRODUCT
LEFT SEMIDIRECT PRODUCT
RIGHT SEMIDIRECT PRODUCT
REVERSED TILDE EQUALS
EQUAL AND PARALLEL TO
LESS-THAN WITH DOT
GREATER-THAN WITH DOT
VERY MUCH LESS-THAN
VERY MUCH GREATER-THAN
LESS-THAN EQUAL TO OR GREATER-THAN
GREATER-THAN EQUAL TO OR LESS-THAN
EQUAL TO OR LESS-THAN
EQUAL TO OR GREATER-THAN
EQUAL TO OR PRECEDES
EQUAL TO OR SUCCEEDS
DOES NOT PRECEDE OR EQUAL
DOES NOT SUCCEED OR EQUAL
NOT SQUARE IMAGE OF OR EQUAL TO
NOT SQUARE ORIGINAL OF OR EQUAL TO
SQUARE IMAGE OF OR NOT EQUAL TO
SQUARE ORIGINAL OF OR NOT EQUAL TO
LESS-THAN BUT NOT EQUIVALENT TO
GREATER-THAN BUT NOT EQUIVALENT TO
PRECEDES BUT NOT EQUIVALENT TO
SUCCEEDS BUT NOT EQUIVALENT TO
NOT NORMAL SUBGROUP OF
DOES NOT CONTAIN AS NORMAL SUBGROUP
NOT NORMAL SUBGROUP OF OR EQUAL TO
DOES NOT CONTAIN AS NORMAL SUBGROUP OR EQUAL
VERTICAL ELLIPSIS
MIDLINE HORIZONTAL ELLIPSIS
UP RIGHT DIAGONAL ELLIPSIS
DOWN RIGHT DIAGONAL ELLIPSIS
About The Codes
Use these codes if you need to insert a
word or short phrase within
a multilingual text.
Declare Unicode Encoding
The codes listed below are valid for
HTML pages only, and may not work on very old browsers. To make your page a
Unicode page, add the following meta tag to the &head& portion of your document.
&meta http-equiv="Content-Type" content="text/ charset=utf-8"&
If you forget to include this tag, then some browsers, such as Netscape 4.7,
may not display the characters properly.
The final close slash must be included after the final quote mark in the encoding header tag if you are using XHTML
&meta http-equiv="Content-Type" content="text/ charset=utf-8" /&
No Encoding Declared
If no encoding is declared, then the browser uses the default setting, which
in the U.S. is typically Latin-1. In that case many Unicode characters could be displayed incorrectly. Also, older browsers such as Netscape 4.7 may not be able to process the entity codes correctly without the &utf-8& declaration.Using the Entity Codes
The Unicode numeric entity codes can be expressed as either decimal numbers or
hexadecimal numbers.
For instance, the decimal version of
the therefore symbol
would be ∴
The hexadecimal version of the therefore symbol
would be ∴
Note that the hexadecimal numbers include x as part of the code.
Windows Word Numeric Alt Codes
Use ALT plus the decimal version of any code to input it into a Windows document.
Note: These work only in Word 2003+ for Windows. Users with other software or versions of Windows may wish to
OS X Option Codes
If an application supports the
then use Option plus
the hexadecimal number.
Last Modified:
Tuesday, 19-May-:22 EDT-0.16a²+0.81b²=？ （x²+y²）²-x²y²=?_百度知道
-0.16a²+0.81b²=？ （x²+y²）²-x²y²=?
前面两题和下面5题用用多项式分解因式(3a+2b)²-(a-4b)²=? 2x-8x³=? a³b-4ab³=？9a²&#;9*b⁴ⁿ=？a³ⁿ﹣aⁿb²=?因式分解计算68.3²-31.7²=?99&#⅝=？2.7*1.8²-1.2*1.2²=？201²-52²+253*851
提问者采纳
0.16a²+0.81b²=-(0.4a)^2+(0.9b)^2=(0.9b-0.4a)(0.9b+0.4a)
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