arnelius990 4^(-x) = 1/128
1/(4^x) = 1/128 =>
4^x = 128
2^(2x) = 2^7
2x=7
x=3.5
Ответ: 3.5

IrkaShevko

Verified answer

(2^2)^-x=1/2^7
2^-2x=2^7
-2x=-7
x=7/2