3) Let f'be the function given by (x-1)(x²-4). For what positive values of a is f continuous for all real numbers x? 2 x-a (A) none (B) 1 only (C) 2 only (D) 4 only (E) 1 and 4 only

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A: f(-2) = -4

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Q: 3) Find domain of the following functions х+4 a) f (x) = х2+2х-8

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A: The given function is:

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Q: 5) For functions f (x) = x² – 15x + 45 and g(x) = x - 9, find |(x)

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A:

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A: We have to properties of continuity first.

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