Question

vă rog foarte repede dau coroana​

Answer 1

Explicație pas cu pas:

a) (2/5)^2x = (2/5)^6

2x = 6

x=3

b) (1/9)^(x+5) = (1/9)^10

x + 5 = 10

x = 5

c) (3/7)^x :(3/7)^3 = (3/7)^2

(3/7)^(x-3) = (3/7)^2

x - 3 = 2

x = 5