Question

7 la puterea x ,+ 7la puterea x+2=2450.Va rog ajutați-mă!!!

Answer 1

$7^{x} + 7^{x+2} = 2450 =\ \textgreater \ 7^{x}$ x $50 =\ \textgreater \ 7^{x} =2450 :50 = 49 =\ \textgreater \ 7^{x} = 7^{2}$

Raspuns : x = 2