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Multiple Choice
Let R be the region bounded by the graphs of and . What is the area of R?
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Verified step by step guidance
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Step 1: Identify the region R by finding the points of intersection between the two curves y = 2x and y = 4x - x^2. Set 2x = 4x - x^2 and solve for x. This will give the x-coordinates of the intersection points.
Step 2: Determine the bounds of integration. The x-values obtained from the intersection points will serve as the limits of integration for calculating the area.
Step 3: Set up the integral to find the area of R. The area is calculated by subtracting the lower curve (y = 2x) from the upper curve (y = 4x - x^2) and integrating over the interval determined in Step 2. The integral will be: ∫[lower bound, upper bound] ((4x - x^2) - (2x)) dx.
Step 4: Simplify the integrand. Combine like terms to simplify the expression inside the integral: (4x - x^2 - 2x) = (2x - x^2). The integral becomes ∫[lower bound, upper bound] (2x - x^2) dx.
Step 5: Compute the integral. Break it into two parts: ∫[lower bound, upper bound] 2x dx and ∫[lower bound, upper bound] -x^2 dx. Evaluate each part using the power rule for integration, and then subtract the results to find the area of R.