Đáp án:
Giải thích các bước giải:
`a,2^(2x-1)=64`
`=>2^(2x-1)=2^6`
`=>2x-1=6`
`=>2x=7`
`=>x=7/2`
`b,(2x+3)^3=125`
`=>(2x+3)^3=5^3`
`=>2x+3=5`
`=>2x=2`
`=>x=1`
`c,(4x-2)^2=64`
`=>(4x-2)^2=(+-8)^2`
`=>`\(\left[ \begin{array}{l}4x-2=8\\4x-2=-8\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}4x=10\\4x=-6\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=\dfrac{5}{2}\\x=\dfrac{-3}{2}\end{array} \right.\)