Question

Làm phép tính chia :
a, 8^3 : ( -8 )^-5
b, x^3 y^4 : x^3 y
c, 5x^2 y^4 : 10x^2 y
d, 3/4 ( xy )^3 : ( -1/2x^2 y^2 )
Giúp mk vs ạ mk đang cần gấp ạ

Answer 1

Lời giải:

a)

$8^3:(-8)^{-5}=8^3.(-8)^5=8^3.(-8^5)=-8^3.8^5=-8^{3+5}=-8^{13}$

b)

$x^3y^4:(x^3y)=x^{3-3}.y^{4-1}=x^0.y^3=y^3$

c)

$5x^2y^4:(10x^2y)=(5:10).(x^2:x^2)(y^4:y)=\frac{1}{2}.1.y^3=\frac{1}{2}y^3$

d)

$\frac{3}{4}(xy)^3:(\frac{-1}{2}x^2y^2)$

$=(\frac{3}{4}: \frac{-1}{2})(x^3:x^2).(y^3:y^2)$

$=\frac{-3}{2}xy$