Question

Решите неравенство 3ˣ + 3ˣ⁺¹ > 12

Answer 1

$3^x+3^{x+1} textgreater 12 \ 3^x(1+3) textgreater 12 \ 3^x*4 textgreater 12 \ 3^x textgreater 3 \ 3^x textgreater 3^1 \ x textgreater 1$

Ответ: x>1