Răspuns:
Explicație pas cu pas:
a) (-7)^5·(-1/7)^7=(-7)^5·(-7)^(-7)=(-7)^(5-7)=(-7)^(-2)=(-1/7)²=1/49
b) (1/3)^10·(1/3)^(-4)·(1/3)³=(1/3)^(10-4+3)=(1/3)^9
c)(-2/3)^4·(-2/3)^5:(-2/3)^10=(-2/3)^(4+5-10)=(-2/3)^(-1)=-3/2
