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For the function 
f(x)=8x^(2)-2x+11, find the slope of the tangent line at 
x=11.
Answer:

For the function f(x)=8x22x+11 f(x)=8 x^{2}-2 x+11 , find the slope of the tangent line at x=11 x=11 .\newlineAnswer:

Full solution

Q. For the function f(x)=8x22x+11 f(x)=8 x^{2}-2 x+11 , find the slope of the tangent line at x=11 x=11 .\newlineAnswer:
  1. Calculate Derivative: To find the slope of the tangent line at a specific point on the graph of a function, we need to calculate the derivative of the function. The derivative of a function at a given point gives us the slope of the tangent line at that point.
  2. Apply Power Rule: The function given is f(x)=8x22x+11f(x) = 8x^2 - 2x + 11. We will find the derivative of this function, f(x)f'(x), using the power rule. The power rule states that the derivative of xnx^n is nx(n1)n \cdot x^{(n-1)}.
  3. Evaluate Derivative at x=11x=11: Applying the power rule to each term of the function:\newlineThe derivative of 8x28x^2 is 16x16x (since 28x21=16x2\cdot8x^{2-1} = 16x).\newlineThe derivative of 2x-2x is 2-2 (since 12x11=21\cdot-2x^{1-1} = -2).\newlineThe derivative of a constant, like 1111, is 00.\newlineSo, the derivative of the function f(x)f(x) is 8x28x^200.
  4. Calculate f(11)f'(11): Now we need to evaluate the derivative at x=11x = 11 to find the slope of the tangent line at that point.\newlinef(11)=16×112f'(11) = 16\times11 - 2.
  5. Find Slope at x=11x=11: Calculate the value of f(11)f'(11):f(11)=16×112=1762=174f'(11) = 16 \times 11 - 2 = 176 - 2 = 174.
  6. Final Answer: The slope of the tangent line at x=11x = 11 is 174174. This is the final answer.

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