Write Newton's formula used to approximate a solution of the equation 2x-x-15=0 and find the third iteration value. Be sure to verify both parts of the answer are correct when making your selection. 2x -Xn -15 O Xn+1 = 2- ; X3 = 2.044471717 6Xn 2 - 1 2Xn -Xn -15 O Xn+1= 2+ : X3 = 1.857593743 6X n 2 -1 2x-X - 15 O Xn+1= Xn -; X3 = 2.042527942 6x- - 1 2Xn -Xn- 15 O Xn+ 1 = Xn- By 2 ;X3 = 1.872499451For the graph shown below, find all values of x for which f(x) is not differentiable. O X =2 O x= - 3, X = 0, X = 2 O X= - 3, X=0 O f(x) is differentiable for all x-values.