Question

Assume that *x* and *y* are both differentiable functions of *t* and find the required values of *dy*/*dt* and *dx*/*dt*.

xy = 2

(a) Find *dy*/*dt*, when *x* = 4, given that

dx/dt = 13.

(b) Find *dx*/*dt*, when *x* = 1, given that

dy/dt = −9.

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