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For the function 
f(x)=2x^(2)-2x-1, find the slope of the secant line between 
x=-2 and 
x=3.
Answer:

For the function f(x)=2x22x1 f(x)=2 x^{2}-2 x-1 , find the slope of the secant line between x=2 x=-2 and x=3 x=3 .\newlineAnswer:

Full solution

Q. For the function f(x)=2x22x1 f(x)=2 x^{2}-2 x-1 , find the slope of the secant line between x=2 x=-2 and x=3 x=3 .\newlineAnswer:
  1. Slope Formula: To find the slope of the secant line between two points on a function, we use the formula for slope, which is the change in yy divided by the change in xx. This is also known as the difference quotient. The formula is (f(x2)f(x1))/(x2x1)(f(x_2) - f(x_1)) / (x_2 - x_1), where x1x_1 and x2x_2 are the xx-values of the two points.
  2. Find f(2)f(-2): First, we need to find the y-value for x=2x = -2, which is f(2)f(-2). We substitute 2-2 into the function f(x)=2x22x1f(x) = 2x^2 - 2x - 1 to get f(2)=2(2)22(2)1f(-2) = 2(-2)^2 - 2(-2) - 1.
  3. Calculate f(2)f(-2): Calculating f(2)f(-2) gives us f(2)=2(4)+41=8+41=11f(-2) = 2(4) + 4 - 1 = 8 + 4 - 1 = 11.
  4. Find f(3)f(3): Next, we need to find the y-value for x=3x = 3, which is f(3)f(3). We substitute 33 into the function f(x)=2x22x1f(x) = 2x^2 - 2x - 1 to get f(3)=2(3)22(3)1f(3) = 2(3)^2 - 2(3) - 1.
  5. Calculate f(3)f(3): Calculating f(3)f(3) gives us f(3)=2(9)61=1861=11f(3) = 2(9) - 6 - 1 = 18 - 6 - 1 = 11.
  6. Calculate f(3)f(3): Calculating f(3)f(3) correctly gives us f(3)=2(9)61=1861=11f(3) = 2(9) - 6 - 1 = 18 - 6 - 1 = 11.
  7. Calculate f(3)f(3): Calculating f(3)f(3) correctly gives us f(3)=2(9)61=1861=11f(3) = 2(9) - 6 - 1 = 18 - 6 - 1 = 11.
  8. Calculate f(3)f(3): Calculating f(3)f(3) correctly gives us f(3)=2(9)61=1861=11f(3) = 2(9) - 6 - 1 = 18 - 6 - 1 = 11.Let's calculate f(3)f(3) correctly this time. We have f(3)=2(9)61=1861=11f(3) = 2(9) - 6 - 1 = 18 - 6 - 1 = 11.

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