Question

2 la puterea n+3 + 2 la puterea n+1 + 2 la puterea n =88

Answer 1

2^(n+3)+2^(n+1)+2^n=88
2^n*2^3+2^n*2+2^n=88
2^n(8+2+1)=88
2^n*11=88
2^n=88:11=8
2^n=2^3
n=3

Answer 2

2la n+3+2lan+1+2la n=88
2la n factor comun

2lan(2la3+2+1)=88
2la n(8+3)=88
2la nx11=88
2la n=88:11
2la n=8
2la n=2la 3
n=3