Question

Please help me with number 4 a and b please

Answer 1

`(a)\\f(x)=(x)/(4)\\\\f\left((1)/(2)\right)=((1)/(2))/(2)=(1)/(2\cdot2)=(1)/(4)\\\\(b)\\\\y=(x)/(4)\ \ \ \ |\cdot4\\\\4y=x\to f^(-1)(x)=4x`