Question 4 Find an equation for the line tangent to the given curve xe - e"-y = 0 atx = 1. Not yet answered Marked out of 1.00 Flag question Select one: Oa. y=-x+1 Ob. =1 Oc. y=x+1 Od. y= 0 Oe. y=-x-1Question 9 Find f'(x) for f(x) = (22 + 1)3 Not yet answered Marked out of 1.00 Flag question Select one: O a. f'(x) = 3(2x)2 Ob. f'(x) = 2 + 3x4+3x2+1 O c. f'(x) = 3(x2 + 1)2 O d. f'(x) = 6x(22 +1)2 O e. f'(x) = 6(x2+1)2