Question

2 ^ -1 . 2^n + 4 . 2^n = 9 . 2^5

Ai trả lời đúng mình tick cho

Answer 1

\(2^{-1}.2^n+4.2^n=9.2^5\)

\(=>\frac{1}{2}.2^n+4.2^n=9.2^n=>2^n.\left(\frac{1}{2}+4\right)=9.2^n=>2^n.\frac{9}{2}=9.2^5\)

\(=>2^n=9.2^5:\frac{9}{2}=64=2^6=>n=6\)