1- Find dB/dx for the follow ing functi'on a)- xy = Cot (xy) b- y Sim(hs =-メy %3D c)- y?cos () 2x+2y de x- ztx +2t=4, 2y?-3t° = 4 ,t= 2 e)- X Sint +2X = 3D + tSint- 2+ = 4 t= T

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