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设z=f(x,y)且x=t+sint,y=t^2,f(x,y)可微,则dz/dt
设z=f(x,y)且x=t+sint,y=t^2,f(x,y)可微,求dz/dt
人气:334 ℃ 时间:2020-06-28 20:54:21
解答

f对x的倒数乘以(1+cost)加上f对y的倒数乘以2t

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