2. (a) (2 pts) How can we tell that F()cos(2x) +sec2 (5z) is not an antiderivative of f(x) = sin(2x) + tan2(5x) ? (A brief explanation is fineæ±ust appeal to the definition of an an- tiderivative of a function) (b) (3 pts) Find one antiderivative of f(x) = sin(2x) + sec2(5x).