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Let 
f(x)=(1)/(x^(2)).

f^(')(5)=

Let f(x)=1x2 f(x)=\frac{1}{x^{2}} .\newlinef(5)= f^{\prime}(5)=

Full solution

Q. Let f(x)=1x2 f(x)=\frac{1}{x^{2}} .\newlinef(5)= f^{\prime}(5)=
  1. Apply Power Rule: To find the derivative of the function f(x)=1x2f(x) = \frac{1}{x^2}, we need to apply the power rule for derivatives. The power rule states that the derivative of xnx^n with respect to xx is nx(n1)n \cdot x^{(n-1)}. In this case, we can rewrite the function as f(x)=x2f(x) = x^{-2} and then apply the power rule.
  2. Calculate Derivative: Applying the power rule, we get f(x)=2x(21)=2x3f'(x) = -2\cdot x^{(-2-1)} = -2\cdot x^{-3}. This simplifies the derivative of the function to f(x)=2x3f'(x) = -\frac{2}{x^3}.
  3. Substitute x=5x=5: Now we need to evaluate the derivative at x=5x = 5. We substitute xx with 55 in the derivative function f(x)=2x3f'(x) = -\frac{2}{x^3} to get f(5)=253f'(5) = -\frac{2}{5^3}.
  4. Evaluate f(5)f'(5): Calculating the value of f(5)f'(5), we have f(5)=2(53)=2125f'(5) = -\frac{2}{(5^3)} = -\frac{2}{125}.

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