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[主观题]
已知方程sin(x+y)+sin(y+z)=1确定了隐函数z=f(x,y),求
已知方程sin(x+y)+sin(y+z)=1确定了隐函数z=f(x,y),求
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A.-sin(x+y)(1+y’)=4
B.-sin(1+y’)=4
C.-sin(x+y)=4
D.-sin(x+y)y’=4
A.cos(x+2y)2y'=3
B.cos(x+2y)=3
C.cos(1+2y')=3
D.cos(x+2x)(1+2y')=3
A.A1sin(w1t+φ1)+A2sin(w2t+φ2)
B.A1A2sinw1tsinw2t
C.A1'sinw1t+A2'sinw2t
D.A1'sin(w1t+φ'1)+A2'sin(w2t+φ2')