Problem 13. (1 point) Let y = 2VI. Find the change in y, Ay when x = 2 and Ax = 0.2 Find the differential dy when = = 2 and da = 0.2 Note: You can earn partial credit on this problem. Problem 14. (1 point) Consider the function f(x) = vx - 1. (A) Find f '(1) = (B) Use Theorem 7, page 156 of the Stewart Essential Calculus textbook to find (f )'(1) (f )'(1) = (c) Calculate f (x) and state domain and range of f . Use interval notation. If needed enter inf for co or -inf for -co. f (x) = Domain = Range = Calculate (f )'(1) from the formula for f (x) and check that it agrees with the result of part (B) Note: You can earn partial credit on this