Question

Решите уравнение пж)
4^(x+1)+4^x=320

Answer 1

Ответ:

4x+4+4x=320

8x=316

x= 39,5

Answer 2

$\displaystyle\bf\\4^{x+1} +4^{x} =320\\\\4^{x}\cdot(4+1) =320\\\\4^{x} \cdot 5=320\\\\4^{x} =320:5\\\\4^{x} =64\\\\4^{x} =4^{3} \\\\x=3$