Answer:
(f + g)(0) = f(0) + g(0) = 2 + 4 = 6
(f - g)(0) = f(0) - g(0) = 2 - 4 = -2
(fg)(0) = f(0)g(0) = 2(4) = 8
(f/g)(0) = f(0)/g(0) = 2/4 = 1/2
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