Suppose f(t) and g(t) are single variable differentiable functions.Find \frac{\partial

Phoebe

Phoebe

Answered question

2021-10-05

Suppose f(t) and g(t) are single variable differentiable functions.Find zx and zy for each of the following binary functions.
(a) z=f(x)g(y)
(b) z=g(xy)

Answer & Explanation

pierretteA

pierretteA

Skilled2021-10-06Added 102 answers

Step 1: To deterine
Given:
Suppose f(t) and g(t) ate single variable differentiable functions.
(a) z=f(x)g(y)
(b) z=g(xy)

 

To deterine:

zx& zy
Calculation:
Since, f(x)g(y)
Differentiating with respect to x, we get,
zx=x(f(x)g(y))
zx=g(y)ddx(f(x))+f(x)ddx(g(y))
zx=g(y)f(x)+f(x).0
zx=g(y)f(x)
Now differentiating with respect to y
zy=y(f(x)g(y))
zy=g(y)y(f(x))+f(x)y(g(y))
zy=g(y).0+f(x)g(y)
zy=f(x)g(y)
Calculation:
Since, z=g(xy)
Differentiating with respect to x, we get,
z=g(xy)
Using chain rule, we have,
zx=x(g(xy)),x(xy)
zx=g(xy).y
Now differentiating with respect to y
zy=y(g(xy))
Using chain rule, we have,
zx=y(g(xy)),y(xy)
zx=g(xy).x

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