Given an ellipse with major axis of length 2a and minor axis of length 2b, the area is given by A = rab. The perimeter is approximated by p ST/2(a + b*j For Exercise, a. Determine the area of the ellipse. b. Approximate the perimeter. (x – 1)? y? 9. + -= 1 11

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A: Given:      Surface x23-y2=z       By putting x=0 we get             023-y2=z

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Q: 28 Describe the surface withe cylindrical equabion p?+z?=9. [ Oraw it and Solve it] .

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A: y2=12x ⇒y=23x ⇒dydx=3x ⇒dydx2=3x2 ⇒dydx2=3x ⇒1+dydx2=1+3x ⇒1+dydx2=1+3x

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