Question

Resolva

7^x+1 - 2.7^x + 7^x+1= 36 resposta {1}

Answer 1

$Ola'! \\ \\ 7^{x-1}-2 . 7^{x} + 7^{x+1}=36 \\ \\ 7 ^{x}(\underbrace{ \frac{1}{7}-2+ 7}_{\frac{36}{7} })=36 \\ \\ 7^{x}(\frac{36}{7})=36 \\ \\ 7^{x}=7\¹ \\ \\ \boxed{\boxed{x=1}} \\ \\ Bom~e' ~isso, bons~estudos!$