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Find the area of \newline​​the curved trapezoid bounded by the lines y=3x+6y=3x+6, y=0y=0,\newlinex=1x=-1, x=2x=2. Use integration

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Q. Find the area of \newline​​the curved trapezoid bounded by the lines y=3x+6y=3x+6, y=0y=0,\newlinex=1x=-1, x=2x=2. Use integration
  1. Set up integral: To find the area, we need to integrate the function y=3x+6y=3x+6 between x=1x=-1 and x=2x=2.
  2. Calculate antiderivative: Set up the integral: A=12(3x+6)dxA = \int_{-1}^{2} (3x+6) \, dx.
  3. Plug upper limit: Calculate the antiderivative: A=[32x2+6x]A = \left[\frac{3}{2} x^2 + 6x\right] from 1-1 to 22.
  4. Plug lower limit: Plug in the upper limit: A=[32×22+6×2][antiderivative at lower limit]A = \left[\frac{3}{2} \times 2^2 + 6\times 2\right] - \left[\text{antiderivative at lower limit}\right].
  5. Simplify expression: Plug in the lower limit: A=[32×22+6×2][32×(1)2+6×(1)]A = \left[\frac{3}{2} \times 2^2 + 6\times 2\right] - \left[\frac{3}{2} \times (-1)^2 + 6\times (-1)\right].
  6. Perform subtraction: Simplify the expression: A=[32×4+12][32×16]A = \left[\frac{3}{2} \times 4 + 12\right] - \left[\frac{3}{2} \times 1 - 6\right].
  7. Final calculation: Perform the subtraction: A=[6+12][1.56]A = [6 + 12] - [1.5 - 6].
  8. Area calculation: Final calculation: A=18(4.5)A = 18 - (-4.5).
  9. Area calculation: Final calculation: A=18(4.5)A = 18 - (-4.5).The area of the curved trapezoid is A=22.5A = 22.5 square units.