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標題:
多項式幫幫手
1.(r^3s^2)^7(r/s^3)^4 2.(x^2y)^2除(x/y^3)^3 3.a^2乘(-2a^3)^4除(-8a^3) 4.p^2q^3乘(-pq^2)^2除p^3q^4 要式呀~唔該你~發燒冇返學~
最佳解答:
(1) ( r^3 s^2 )^7 ( r / s^3 )^4 = ( r^21 s^14 )( r^4 / s^12 ) = ( r^21 s^14 r^4 ) / s^12 = r^25 s^2 (2) ( x^2y)^2 / ( x / y^3 )^3 = ( x^4 y^2 ) / ( x^3 / y^9 ) = x^4 y^2 y^9 / x^3 = x y^11 (3) a^2 ( - 2a^3 )^4 / ( - 8a^3 ) = a^2 ( - 2 )^4 ( a^12 ) / ( - 8a^3 ) = 16 a^14 / ( - 8a^3 ) = - 2a^11 (4) p^2q^3( -pq^2 )^2 / p^3q^4 = ( p^2 q^3 )( p^2 q^4 ) / p^3 q^4 = p^4 q^7/ p^3 q^4 = pq^3 2007-09-27 13:53:17 補充： 指數法則: ( a^m )( a^n ) = a^ ( m + n ) a^m / a^n = a ^ ( m - n ) ( a^m )^n = a^( mn )
其他解答:
指數法則: ( a^m )( a^n ) = a^ ( m + n ) a^m / a^n = a ^ ( m - n ) ( a^m )^n = a^( mn )
多項式幫幫手
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發問:1.(r^3s^2)^7(r/s^3)^4 2.(x^2y)^2除(x/y^3)^3 3.a^2乘(-2a^3)^4除(-8a^3) 4.p^2q^3乘(-pq^2)^2除p^3q^4 要式呀~唔該你~發燒冇返學~
最佳解答:
(1) ( r^3 s^2 )^7 ( r / s^3 )^4 = ( r^21 s^14 )( r^4 / s^12 ) = ( r^21 s^14 r^4 ) / s^12 = r^25 s^2 (2) ( x^2y)^2 / ( x / y^3 )^3 = ( x^4 y^2 ) / ( x^3 / y^9 ) = x^4 y^2 y^9 / x^3 = x y^11 (3) a^2 ( - 2a^3 )^4 / ( - 8a^3 ) = a^2 ( - 2 )^4 ( a^12 ) / ( - 8a^3 ) = 16 a^14 / ( - 8a^3 ) = - 2a^11 (4) p^2q^3( -pq^2 )^2 / p^3q^4 = ( p^2 q^3 )( p^2 q^4 ) / p^3 q^4 = p^4 q^7/ p^3 q^4 = pq^3 2007-09-27 13:53:17 補充： 指數法則: ( a^m )( a^n ) = a^ ( m + n ) a^m / a^n = a ^ ( m - n ) ( a^m )^n = a^( mn )
其他解答:
指數法則: ( a^m )( a^n ) = a^ ( m + n ) a^m / a^n = a ^ ( m - n ) ( a^m )^n = a^( mn )
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