4. If f(u) = u# +3 and u = g(x) =-, find the value of (f . g)' at x = 1. 5. A curve is parametrizationations x - vr and 5. y = (1-3)". Find an equation of the line tangent to the curve at the point defined by t = 9. 6. What is the largest value possible for the slope of the curve 6. y = cos(10x)? 7. Which of the following could be true if f"(1) =1-213 ? 7. I. f (1) =14 II. f'(1) = 7-31/3 III. f (1) = - -1 3 (A) I only (B) III only (C) I and II (D) I and III (E) I, II, and III 8. Use implicit differentiation to find - if 2xy + y = x+ y. 8. 9. Find the slope of the curve x+ y = 26 at the point (1, 5). 9. 10. Find y if y = cot (x2 ). 10