20 14 national college entrance examination outline edition, that is, Guangxi college entrance examination, how to do 22 questions of science mathematics, and the finale of college entrance examination, I still find it difficult. This topic mainly investigates the relationship between monotonicity and derivative of function, and proves inequality by mathematical induction, which is comprehensive and difficult. See /exercise/math/804078 for the answers and ideas you want:

(1) Find the derivative of the function. By discussing the value service of A, we can get the monotonicity of f(x).

(2) Inequality can be proved by mathematical induction.

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