Question

2 mũ x + mũ 3 + 2 mũ x = 144 

Answer 1

Ta có:

\(2^{x+3}+2^x=144\Rightarrow2^x.2^3+2^x=144\)

\(\Rightarrow2^x.\left(2^3+1\right)=144\Rightarrow2^x.9=144\)

\(\Rightarrow2^x=144:9\Rightarrow2^x=16\)

\(\Rightarrow2^x=2^4\Rightarrow x=4\)

Answer 2

2^x+3 + 2^x = 144

2^x( 2³ +1) = 144

2^x . 9 = 144

2^x = 16

2^x = 2⁴ => x=4