Problem 9 (10 Marks) - Use surface integral to find the area of the part of the surface $z = x^2 + y^2$ that is below the plane $z = 4$ in the first octant. Note $\int \sqrt{a^2 + u^2} du = 0.5u\sqrt{a^2 + u^2} + 0.5a^2ln(u + \sqrt{a^2 + u^2})$.
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The surface is given by $z = x^2 + y^2$. We want to find the area of the part of the surface below the plane $z = 4$ in the first octant. The surface area is given by the surface integral: $$A = \iint_S dS$$ where $dS = \sqrt{1 + (\frac{\partial z}{\partial x})^2 Show more…
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