Question

tìm x:

2^x+2^x+3=144

Answer 1

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

\(\Leftrightarrow2^x\left(1+2^3\right)=144\)

\(\Leftrightarrow2^x=16\)

\(\Leftrightarrow x=4\)

 

Answer 2

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

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

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

\(\Rightarrow2^x.9=144\)

\(\Rightarrow2^x=16\)

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

\(\Rightarrow x=4\)

Vậy \(x=4\)

Answer 3

2^x + 2^x.2³=144

<=> 2^x(1+2³)=144

<=> 2^x=16

<=> x=4