Question

x的m次方等于5,x的n次方等于3,求x的2m-3n次方

Answer 1

x^(2m-3n)=(x^m)^2/[(x^n)^3]=5²/3³＝25/27

x^(2m-3n)

＝(x^2m)/(x^3n)

＝(x^m)²/(x^n)³

＝5²/3³

＝25/27