天津市静海县2019届高考数学二轮复习第三章导数第五节导数与函数的零点校本作业(无答案).doc

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1第三章 导数 第五节: 导数与函数的零点 第 1 课时一、基础题1.(张福宾校长)关于函数零点是重点问题(1)你总结一下,关于判断函数 )(xgfy的零点问题有哪些方法,请由易到难排列出来,并举例说明;(2)你总结设计零点问题都有哪些重要题型及其解决方法,并简单举例.2已知函数 f(x) x33 ax1, a0。(1)求 f(x)的单调区间;(2)若 f(x)在 x1 处取得极值,直线 y m 与 y f(x)的图象有三个不同的交点,求m 的取值范围。3已知 f(x) x23 x1, g(x) x。a 1x 1(1)a2 时,求 y f(x)和 y g(x)的公共点个数;(2)a 为何值时, y f(x)和 y g(x)的公共点个数恰为两个。2二、中档题1设函数 f(x) aex(x1), g(x) x2 bx2,已知它们在 x0 处有相同的切线。(1)求函数 f(x), g(x)的解析式;(2)求函数 f(x)在 t, t1( t3)上的最小值;(3)判断函数 F(x)2 f(x) g(x)2 的零点个数。2已知函数 f(x) x2(1) k2alnx(kN, aR,且 a0)。(1)求 f(x)的极值;(2)若 k2 016,关于 x 的方程 f(x)2 ax 有唯一解,求 a 的值。

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