\(2^x+2^{x+3}=144\\ 2^x\left(1+2^3\right)=144\\ 2^x.9=144\\ 2^x=16\\ 2^x=2^4\\ \Rightarrow x=4\)
\(2^x+2^x+3=144\)
\(2\left(2^x\right)=144-3\)
\(2\left(2^x\right)=141\)
\(2^x=\frac{141}{2}\)
vô lí nhỉ????
à sorry mik nghĩ đề khác!! bn nguyễn nhật minh lm đúng rùi
\(2^x+2^{x+3}=144\)\(\)
\(2^x\cdot9=144\)
\(2^x=16\)
\(x=4\)
vậy x = 4
\(2^x+2^{x+3}=144\)
\(\Leftrightarrow2^x\left(1+2^3\right)=144\)
\(\Leftrightarrow2^x.9=144\)
\(\Leftrightarrow2^x=16\)
\(\Leftrightarrow2x=2^4\)
\(\Leftrightarrow x=4\)
