Continuity at a point Determine whether the following functions are continuous at a. Justify each answer using the continuity checklist. 3x? + 2x + 1 3x? + 2x + 1 a. flx2 a = 1 b. g1x2 = 2 x - 1 - 1 1 X sin if x + 0 c. h1x2 = 0 if x =

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