寫(xiě)作文時(shí)的優(yōu)美句子
【第1句】： 作文開(kāi)頭的優(yōu)美句子
我們已經(jīng)看到如何約略oxima teafunct ionusingitstangentli val ueatsomepoint(sayf(a))andthevalueofthederivativeatthesame
效果好（英國(guó)《金融時(shí)報(bào)》（a）)wecanusetheseto findthetangentline,andthenusethetangentlinetoapproximatef(x)
forotherpoints x.Ofcourse thisapproximationwillonlybegoodwhenxisrelativelyneara.Thetangentlineapproximationoff(x)forxnearaiscalledthefirstdegreeTaylorPolynomialoff(x)并：
