a) \(2^{4x-8}=16\)
\(2^{4x-8}=2^4\)
`=>4x-8=4`
`4x=12`
`x=12/4`
`x=3`
b) \(\left[2\cdot\left(x\cdot1\right)+6\right]^5=1\)
\(\left(2x+6\right)^5=1\)
\(\left(2x+6\right)^5=1^5\)
\(2x+6=1\)
`2x=1-6`
`2x=-5`
`x=-5:2`
`=>x=-5/2`
c) chưa hiểu đề bài
a)
\(=>2^{4x-8}=2^4\)
\(=>4x-8=4\)
\(4x=12\)
\(x=3\)
b)
\(=>2.\left(x.1\right)+6=1\)
\(2x\left(x.1\right)=-5\)
\(x.1=\dfrac{-5}{2}\)
\(x=\dfrac{-5}{2}\)
c)
\(7x.14=\dfrac{49}{2}\)
\(7x=\dfrac{7}{4}\)
\(x=\dfrac{1}{4}\)