Find f’ in terms of g’. f(x)=x^2 g(x)

jeseHainsij

jeseHainsij

Answered question

2021-11-14

Find f’ in terms of g’.
f(x)=x2g(x)

Answer & Explanation

Vincent Diaz

Vincent Diaz

Beginner2021-11-15Added 19 answers

f(x)=x2g(x)
Differentiate with respect to x
f(x)=d[x2g(x)]dx
The Product Rule for differentiation
[f(x)g(x)]=f(x)g(x)+f(x)g(x)
f(x)=d(x2)dxg(x)+x2d[g(x)]dx
The Power Rule
If n is a non-zero real number, then d(xn)dx=nxn1
f(x)=2x21g(x)+x2g(x)
f(x)=2xg(x)+x2g(x)
Result:
f(x)=2xg(x)+x2g(x)
Eliza Beth13

Eliza Beth13

Skilled2023-06-18Added 130 answers

To find the derivative of f in terms of g, we can use the product rule of differentiation. The product rule states that if we have two functions u(x) and v(x), then the derivative of their product uv is given by:
(uv)=uv+uv
In this case, u(x)=x2 and v(x)=g(x). We can differentiate each of these functions separately:
u(x)=2xandv(x)=g(x)
Applying the product rule, we have:
f(x)=(x2)g(x)+x2g(x)
Simplifying this expression, we get:
f(x)=2xg(x)+x2g(x)
Therefore, the derivative of f in terms of g is 2xg(x)+x2g(x).
madeleinejames20

madeleinejames20

Skilled2023-06-18Added 165 answers

Step 1: Given:
f(x)=u(x)·v(x)+u(x)·v(x)
In our case, f(x)=x2·g(x), where u(x)=x2 and v(x)=g(x). To find f(x), we need to find the derivatives of u(x) and v(x), denoted as u(x) and v(x) respectively.
Let's start by finding u(x):
u(x)=x2
Using the power rule for differentiation, we have:
u(x)=2x
Step 2: Now, let's find v(x):
v(x)=g(x)
We are given that g(x) is the derivative of g(x), so we can simply write:
v(x)=g(x)
Finally, we can substitute these values into the product rule formula:
f(x)=u(x)·v(x)+u(x)·v(x)
f(x)=(2x)·g(x)+(x2)·g(x)
Hence, the derivative of f(x)=x2·g(x) with respect to x is given by f(x)=(2x)·g(x)+(x2)·g(x).

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