Question

(1)a-b的7次方除b-a的5次方乘b-a的3次方,(2)3次方,0次方

Answer 1

1) (a-b)^7÷ (b-a)^5×(b-a)^3=- (b-a)^7÷ (b-a)^5×(b-a)^3=-(b-a)^(7-5+3)=-(b-a)^5=(a-b)^5

2) (-1/2)^3÷(-1/2)-(-1)^0=(1/2)^2-1=-3/4