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\text { a. The most general antiderivative of } f^{\prime}(x)=\frac{3 x^{3}+2}{x}+4 \sec ^{2} x \text { is: } \text { A) } f(x)=x^{4}+2 \ln |x|+4 \tan x+C \text { B)

} f(x)=x^{3}+\ln |x|+4 \tan x+C \text { C) } f(x)=x^{3}+2 x+8 \tan x+C \text { D) None of them }

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