[微分] 隐函数微分

楼主: anger50322 (江)   2014-04-27 16:56:24
欸欸用。我(x+y)/(x-y)=1/y,求dy/dx=?
答案是 (1-y)/(x+2y+1)
算不出这个答案
http://i.imgur.com/TCtpjgh.jpg附上算式,请教各位

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