5. If f(x) dx = 12 and f f(x) dx = 4, then all of the following must be tru a. ff(x) dx = 16 ✓ b. ff(x) dx-f3f(x) dx = 0 / c. ff(x) dx = -12/ d. f(x) dx = -4 e. ff(x) dx + f f(x) dx = 16

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