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For the following equation, evaluate 
f^(')(2).

f(x)=-x^(4)+5x
Answer:

For the following equation, evaluate f(2) f^{\prime}(2) .\newlinef(x)=x4+5x f(x)=-x^{4}+5 x \newlineAnswer:

Full solution

Q. For the following equation, evaluate f(2) f^{\prime}(2) .\newlinef(x)=x4+5x f(x)=-x^{4}+5 x \newlineAnswer:
  1. Identify Function: Given the function f(x)=x4+5xf(x) = -x^4 + 5x, we need to find the derivative of the function, which is denoted by f(x)f'(x). The derivative of a function gives us the rate at which the function's value changes at any given point.
  2. Apply Power Rule: To find f(x)f'(x), we will use the power rule for differentiation, which states that the derivative of xnx^n with respect to xx is nx(n1)n*x^{(n-1)}. We will apply this rule to each term in the function separately.
  3. Combine Derivatives: The derivative of the first term x4-x^4 with respect to xx is 4x3-4x^3 (using the power rule). The derivative of the second term 5x5x with respect to xx is 55 (since the derivative of xx is 11 and 55 is a constant).
  4. Evaluate at x=2x=2: Combining the derivatives of both terms, we get f(x)=4x3+5f'(x) = -4x^3 + 5.
  5. Calculate Final Value: Now we need to evaluate f(x)f'(x) at x=2x = 2. We substitute xx with 22 in the derivative we found: f(2)=4(2)3+5f'(2) = -4(2)^3 + 5.
  6. Calculate Final Value: Now we need to evaluate f(x)f'(x) at x=2x = 2. We substitute xx with 22 in the derivative we found: f(2)=4(2)3+5f'(2) = -4(2)^3 + 5. Calculating the value, f(2)=4(8)+5=32+5=27f'(2) = -4(8) + 5 = -32 + 5 = -27.

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