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

$2$
Solve $\lim\limits_{(x,y,z) \to (3,3,0)}(1+\sec^2 z)$ Now, $\lim\limits_{(x,y,z) \to (3,3,0)}(1+\sec^2 z)=(1+\sec^2 (0))$ Thus, we get $(1+(1)^2)=2$