## University Calculus: Early Transcendentals (3rd Edition)

Since, we have $x^2+y^2+4z^2=10$ This can be re-written as: $\dfrac{x^2}{(\sqrt{10})^2}+\dfrac{y^2}{(\sqrt{10})^2}+\dfrac{z^2}{(\sqrt{10}/2)^2}=1$ Thus, the above equation is a graph for the ellipsoid of revolution as shown in graph (d).