3. Find the values of a and b such that the following function is continuous at x = 4. Justify your answer. bx? -Зах -9 х <4 f(x) = { 56 + a x = 4 бах — 13 x > 4 (a) Find f(4) 4. Find the values of a and b such that the following function is continuous everywhere. Justify your answer. (a) ax? + 2bx - 19 x < 2 f(x) = {9 x = 2 4bx 15 x > 2 5. Use the Intermediate Value Theorem (IVT) to show that the equation below has a root in the associated interval. (a) 2x + x2 + x+3 = 0 (-2,0)

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