Question

ma poate ajuta cineva la ex acestea?
Dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

((5/7)^8))^4 :(5/7)^30= (5/7)^32 : (5/7)^30= (5/7)^2=25/49

am folosit a^m*a^n=a^(m+n)

(a^m)^n=a^(m*n)

b)  f= (2/3)^5* (2/3)^-3-(1/6)^2= (2/3)^2 -( 1/6)=4/9 - (1/6)=5/18 dupa ce am adus la acelasi numitor

5/18=10/24 nu sunt echivalente

am folosit pe langa regulile de la punctu a si

(a/b)^m=(b/a)^-m