Question

分式上下都有自变量的函数怎么求最值?

Answer 1

f (-x) = -f(x) f(x)为奇函数,依原点中心对称； f(0) = 0f(±∞) = ±8√5/5令：f ’(x) = 0 -> {x√(x^2+1)}'(1+5x^2) = 10x^2√(x^2+1)  ...