分析:(1)利用復(fù)合函數(shù)的求導(dǎo)的運(yùn)算法則:外函數(shù)的導(dǎo)數(shù)乘以內(nèi)函數(shù)的導(dǎo)數(shù)及冪函數(shù)的導(dǎo)數(shù)公式求出函數(shù)的導(dǎo)函數(shù).
(2)利用利用復(fù)合函數(shù)導(dǎo)數(shù)的運(yùn)算法則:外函數(shù)的導(dǎo)數(shù)乘以內(nèi)函數(shù)的導(dǎo)數(shù)及導(dǎo)數(shù)公式求出函數(shù)的導(dǎo)函數(shù)
解答:解:(1)
y′=()′=•=;
(2)y'=cos(-5x+2)(-5x+2)'=-5cos(-5x+2)
點(diǎn)評(píng):求函數(shù)的導(dǎo)函數(shù),一個(gè)先判斷函數(shù)的形式,然后根據(jù)形式選擇合適的導(dǎo)數(shù)運(yùn)算法則及導(dǎo)數(shù)公式.