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Math 1131 Practice Problems for Exam 1 14. If f(x) = 3x10, then lim f (1 + h) - f(1) ; h-+0 h is which of the following? [1] (A) f'(x) (B) f'(1) (C) Does not exist (D) O (E) None of the above 15. If we want to calculate the derivative f'(x) of f(x) = 3x + 4 using the limit definition of the evaluate? derivative which of the following limits do we need to evaluate and to what does the limit [1] (A) lim 3(x + h) +4 - (3x + 4) h-+0 h = 3 (B) lim 3(x + h) + 4 -(3x + 4) h-+0 h = 0 C) lim 3h +4 - (3x + 4) h-+0 h = 3x + 3 D) lim - 3(x + h) +4 - (3h +4) h-+0 h = 3 (E) None of the above