๐…๐ข๐ง๐ ๐ญ๐ก๐ž ๐š๐ซ๐ž๐š ๐จ๐Ÿ ๐ญ๐ก๐ž ๐Ÿ๐ข๐ง๐ข๐ญ๐ž ๐ซ๐ž๐ ๐ข๐จ๐ง ๐›๐จ๐ฎ๐ง๐๐ž๐ ๐›๐ฒ ๐ญ๐ก๐ž ๐œ๐ฎ๐ซ๐ฏ๐ž ๐š๐ง๐ ๐ญ๐ก๐ž ๐— ๐š๐ฑ๐ข๐ฌ ๐˜= 8๐ฑ-๐ฑยฒ-12

Mathematics

ScanSolve AI Answer

Answer

323\frac{32}{3}

Step-by-step solution

3 steps

To find the area of the finite region bounded by the curve Y=8xโˆ’x2โˆ’12Y = 8x - x^2 - 12 and the x-axis, we first need to find the x-intercepts of the curve. These will be our limits of integration.

  1. Find the x-intercepts.

    Set Y=0Y = 0:

    8xโˆ’x2โˆ’12=08x - x^2 - 12 = 0

    Rearrange the terms into standard quadratic form:

    โˆ’x2+8xโˆ’12=0-x^2 + 8x - 12 = 0

    Multiply by โˆ’1-1 to make the leading coefficient positive:

    x2โˆ’8x+12=0x^2 - 8x + 12 = 0

    Factor the quadratic equation:

    (xโˆ’2)(xโˆ’6)=0(x - 2)(x - 6) = 0

    This gives us the x-intercepts:

    x=2andx=6x = 2 \quad \text{and} \quad x = 6

    These are the limits of integration.

  2. Set up the definite integral.

    The area AA is given by the integral of the function from x=2x=2 to x=6x=6:

    A=โˆซ26(8xโˆ’x2โˆ’12)โ€‰dxA = \int_{2}^{6} (8x - x^2 - 12)\,dx
  3. Evaluate the integral.

    First, find the antiderivative of the function:

    โˆซ(8xโˆ’x2โˆ’12)โ€‰dx=8x22โˆ’x33โˆ’12x+C\int (8x - x^2 - 12)\,dx = 8\frac{x^2}{2} - \frac{x^3}{3} - 12x + C =4x2โˆ’x33โˆ’12x+C= 4x^2 - \frac{x^3}{3} - 12x + C

    Now, evaluate the definite integral using the limits:

    A=[4x2โˆ’x33โˆ’12x]26A = \left[ 4x^2 - \frac{x^3}{3} - 12x \right]_{2}^{6}

    Substitute the upper limit (x=6x=6):

    F(6)=4(6)2โˆ’(6)33โˆ’12(6)F(6) = 4(6)^2 - \frac{(6)^3}{3} - 12(6) F(6)=4(36)โˆ’2163โˆ’72F(6) = 4(36) - \frac{216}{3} - 72 F(6)=144โˆ’72โˆ’72F(6) = 144 - 72 - 72 F(6)=0F(6) = 0

    Substitute the lower limit (x=2x=2):

    F(2)=4(2)2โˆ’(2)33โˆ’12(2)F(2) = 4(2)^2 - \frac{(2)^3}{3} - 12(2) F(2)=4(4)โˆ’83โˆ’24F(2) = 4(4) - \frac{8}{3} - 24 F(2)=16โˆ’83โˆ’24F(2) = 16 - \frac{8}{3} - 24 F(2)=โˆ’8โˆ’83F(2) = -8 - \frac{8}{3} F(2)=โˆ’243โˆ’83F(2) = -\frac{24}{3} - \frac{8}{3} F(2)=โˆ’323F(2) = -\frac{32}{3}

    Finally, subtract F(2)F(2) from F(6)F(6):

    A=F(6)โˆ’F(2)A = F(6) - F(2) A=0โˆ’(โˆ’323)A = 0 - \left(-\frac{32}{3}\right) A=323A = \frac{32}{3}

    The area of the finite region is 323\frac{32}{3}.

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