Chapter 1.3, Problem 1E

Find the forward and backward error for the following functions, where the root $3/4$ and the approximate root is $x_a=0.74$ :

(a) $f\left(x\right)=4x-3$
(b) $f\left(x\right)={\left(4x-3\right)}^2$
(c) $f\left(x\right)={\left(4x-3\right)}^3$
(d) $f\left(x\right)={\left(4x-3\right)}^{1/3}$