Question

Answer 1

\(\Leftrightarrow2^n\cdot9=144\)

hay n=4

Answer 2

\(2^{n+3}+2^n=144 \\2^n.2^3+2^n=144 \\2^n.9=144 \\2^n=16 \\n=4\)

Answer 3

\(2^{n+3}+2^n=144\\ 2^n\left(2^3+1\right)=144\\ 2^n\left(8+1\right)=144\\ 2^n.9=144\\ 2^n=144:9\\ 2^n=16\\ 2^n=2^4\\ n=4\)