f(x, y) = x2 + y3 ; X = t2 + t3; y = t3 + t9 Find df dt at t=1. – McqOptions

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1.	f(x, y) = x² + y³ ; X = t² + t³; y = t³ + t⁹ Find ^df _dt at t=1.
A.	0
B.	1
C.	-1
D.	164
Answer» E.

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