Question

Tìm n\(\in\)Z:

3²<2ⁿ<128

Answer 1

32 < 2 mũ n < 128

=> 2 mũ 5 < 2 mũ n < 2 mũ 7

=> 2 mũ n = 2 mũ 6

=> n = 6

Answer 2

\(3^2< 2^n< 128\)

\(\Rightarrow9< 2^n< 128\)

\(\Rightarrow n=5;6;7;8;9;10;11\)