pls help show steps: find the area of the region between y=sqrt(x+3). y=(x+3)/2
|dw:1318115228718:dw|
\[\sqrt{x+3}= \frac{x+3}{2} --> x+3 = \frac{1}{4} (x+3)^2\]
\[\frac{1}{4} ( x^2 +6x +9) -x-3 =0\] Multiply by 4 \[x^2 +6x+9 -4x-12 =0 --> x^2 +2x -3 =0 \]
(x+3)(x-1) =0 ---> x=-3, 1
So now I can redraw the picture.
|dw:1318115539519:dw|
Before I drew the line, now I drew in the sqrt graph and shaded area between is what you to find.
so the interval for the integration is -3<=x<=1 and from the picture we can see that the sqrt function is above the line
\[Area= \int\limits_{-3}^{1} \sqrt{x+3} - \frac{x+3}{2} dx \]
so = int (x+3)^(1/2) - (x+3)/2 dx = (2/3) (x+3)^(3/2) - (x^2 / 4) - (3x/2) between the limits.
\[= [ \frac{2}{3} (0)^{\frac{3}{2}} - \frac{9}{4} +\frac{9}{2} ] -[ \frac{2}{3} (4)^{\frac{3}{2}} - \frac{1}{4}- \frac{3}{2} ]\] Put into a calculator.
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