由dx/dt=5可知X/t=5,因为x=-3,则t=-3/5
dy/dt=y/t,因为y=-2,t=-3/5,
则dy/dt=-2/-3/5=10/3
(y^3-4x^2)/(x^3+2y)=44/31 已知dx/dt=5 x=-3 y=-2 求dy/dt
(y^3-4x^2)/(x^3+2y)=44/31 已知dx/dt=5 x=-3 y=-2 求dy/dt
数学人气:815 ℃时间:2019-12-17 03:18:29
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