Find the indicated derivative of the following function:𝑓(𝑥)=1𝑥𝑓(4)(𝑥)=
Question
Find the indicated derivative of the following function:𝑓(𝑥)=1𝑥𝑓(4)(𝑥)=
Solution
The function given is f(x) = 1/x.
To find the fourth derivative of the function, we first need to find the first, second, and third derivatives.
- First derivative: The derivative of f(x) = 1/x is found using the power rule for derivatives, which states that the derivative of x^n is nx^(n-1). In this case, 1/x is the same as x^-1, so its derivative is -1x^-2, or -1/x^2.
So, f'(x) = -1/x^2.
- Second derivative: Applying the power rule again, the derivative of -1/x^2 is 2/x^3.
So, f''(x) = 2/x^3.
- Third derivative: Applying the power rule once more, the derivative of 2/x^3 is -6/x^4.
So, f'''(x) = -6/x^4.
- Fourth derivative: Finally, applying the power rule one last time, the derivative of -6/x^4 is 24/x^5.
So, f''''(x) = 24/x^5.
Therefore, the fourth derivative of the function f(x) = 1/x is f''''(x) = 24/x^5.
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