急~有數學唔識做？？

你好～～～

以下都是敝人的一些意見，如有錯誤請多多指教！

1.m9次方n-5次方分之m6 次方

= m^6 x [m^6 / (n^-5)]

= (m^6 x m^6) / n^-5

= m^(6+6) x n^(-5)(-1)

= (m^12)(n^5)


2.(x-7次方y)3次方分之x2次方

= x^2 / [x^-7(y)]^3

= x^2 / [x^(-7)(3)(y^3)]

= x^2 / x^-21(y^3)

= x^[2 - (-21)] / (y^3)

= x^23 / y^3


3.a5次方分之(ab2次方)2次方

= (ab^2)^2 / a^5

= a^2[b^(2*2)] / a^5

= a^2(b^4) / a^5

= a^(2 - 5)(b^4)

= a^-3(b^4)

= b^4 / a^3


4.x2次方分之x-3次方y

= x^-3(y) / x^2

= x^(-3 - 2) (y)

= x^-5 (y)

= y / x^5


希望以上解答可以幫到你～～～～～

=抄答案...=x2次方分之-1之方m