求隐函数的导数!要详细过程!
2个回答
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(1) x^y = y^x ylnx = xlny y'lnx+y/x = lny+xy'/y y'(lnx-x/y)= lny - y/x
y' = (lny - y/x)/(lnx - x/y)
(4) y = tan(x+y) y' = (1+y')sec²(x+y) y'[1- sec²(x+y)] = sec²(x+y)
y'= sec²(x+y)/[1- sec²(x+y)]
(2) 同(4),两边对 x 求导;(3)同(1),先取对数,再对x求导。(略)
y' = (lny - y/x)/(lnx - x/y)
(4) y = tan(x+y) y' = (1+y')sec²(x+y) y'[1- sec²(x+y)] = sec²(x+y)
y'= sec²(x+y)/[1- sec²(x+y)]
(2) 同(4),两边对 x 求导;(3)同(1),先取对数,再对x求导。(略)
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