Questions: If f(x)=x, then f'(5)=
5
25/2
1
None of these
1/5
Transcript text: If $f(x)=x$, then $f^{\prime}(5)=$
5
$\frac{25}{2}$
1
None of these
$\frac{1}{5}$
Solution
Solution Steps
To find the derivative of the function \( f(x) = x \), we need to apply the basic rules of differentiation. The derivative of \( f(x) = x \) with respect to \( x \) is a constant, as the rate of change of \( x \) with respect to itself is always 1. Therefore, \( f'(x) = 1 \) for any value of \( x \), including \( x = 5 \).
Step 1: Define the Function
We start with the function defined as \( f(x) = x \).
Step 2: Calculate the Derivative
To find the derivative of \( f(x) \), we apply the differentiation rule. The derivative is given by:
\[
f'(x) = \frac{d}{dx}(x) = 1
\]
Step 3: Evaluate the Derivative at \( x = 5 \)
Next, we evaluate the derivative at the specific point \( x = 5 \):
\[
f'(5) = 1
\]