Use the Fundamental Theorem of Calculus to give alternative proofs of the integration facts shown in Exercises 72–76. You may assume that all functions here are integrable. 72. cdx = c(b – a) 73. x dx = 1 x² dx (b³ – a®) kf (x) dx = k | f(x) dx 74. 75. | (f(«) +g(x)) dx = | f(x) dx + g(x) dx 76.

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