Question 4: By using Lhopitale rule or any alternative method, find the limit limxx1kx.( Read: x to the 1lnx). Show your work. (10 pts)Question 5: Let f(x)=x32x1. Use Newtons formula to write a recursive equation xn=F(xn-1) to solve f(x)=0. Use the recursive equation you found carlier to approximate the root of the equation f(x)=0 on the interval -1,1 by choosing x0=0, and find x1,x2,x3,x4,x3,x6,x7. Show your work. (to ptu)