慶云
導(dǎo)數(shù)問(wèn)題的難度較大,對(duì)同學(xué)們的數(shù)學(xué)抽象思維能力和運(yùn)算能力有著較高的要求.導(dǎo)數(shù)與函數(shù)之間的聯(lián)系緊密,所以在解答導(dǎo)數(shù)問(wèn)題時(shí),通常要根據(jù)已知條件來(lái)構(gòu)造合適的函數(shù)模型,利用函數(shù)的圖象、性質(zhì)來(lái)求得問(wèn)題的答案.這就是構(gòu)造函數(shù)法.運(yùn)用構(gòu)造函數(shù)法解答導(dǎo)數(shù)問(wèn)題的步驟為: