Question: 21. Let f, g E R[a, b]. (a) If t ER, show that So ( if + 8)2 2 0. (b) Use (a) to show
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21. Let f, g E R[a, b]. (a) If t ER, show that So ( if + 8)2 2 0. (b) Use (a) to show that 2 Safg 0. (c) If Sof2 = 0, show that Sofg = 0. (d) Now prove that Safe
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