f(x, y, z, t) = xy + zt + x2 yzt; x = k3 ; y = k2; z = k; t = kFind d – McqOptions

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1.	f(x, y, z, t) = xy + zt + x² yzt; x = k³ ; y = k²; z = k; t = k Find ^df _dt at k = 1
A.	34
B.	16
C.	32
D.	61
Answer» C. 32

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