c) \(\dfrac{4x}{4x-2}+\dfrac{1}{2x\left(1-2x\right)}\left(x\ne\dfrac{1}{2};x\ne0\right)\)
\(=\dfrac{4x}{2\left(2x-1\right)}+\dfrac{1}{-2x\left(2x-1\right)}\)
\(=\dfrac{4x^2}{2x\left(2x-1\right)}+\dfrac{-1}{2x\left(2x-1\right)}\)
\(=\dfrac{4x^2-1}{2x\left(2x-1\right)}\)
\(=\dfrac{\left(2x-1\right)\left(2x+1\right)}{2x\left(2x-1\right)}\)
\(=\dfrac{2x+1}{2x}\)