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Finding Extrema on a Closed Interval In Exercises 23-40, find the absolute extrema of the function on the closed interval. 23. f (x) = 3 - x, [-1, 2] 24. f ( x ) = =x + 2, [0, 4] 25. h(x) = 5 - 2x2, [- 3, 1] 26. f(x) = 7x2 + 1, [-1, 2] 27. f(x) = x3 - 2x2, [- 1, 2] 28. f(x) = 2x3 - 6x, [0, 3] 29. y = 3x2/3 - 2x, [- 1, 1] 30. g(x) = 3x, [-8, 8] 31. g(x) = - 6.x2 x - 2' [-2, 1 ] 32. h(t) = - 1 + 3 ' [-1, 6] 33. y = 3 - |t - 31, [-1,5] 34. g(x) = |x + 41, [-7, 1] 35. f(x) = [x], [-2, 2] 36. h(x) = [2 - x], [-2, 2] 37. f(x) = sin x, 5 11 6 6 38. g(x) = sec x, 6'3 39. y = 3 cos x, [0, 2 ] 40. y = tan X 8 [0, 2]