Double Integrals Introduction. Volume and Double Integral z=f(x,y) ≥ 0 on rectangle R=[a,b]×[c,d] S={(x,y,z) in R 3 | 0 ≤ z ≤ f(x,y), (x,y) in R} Volume.
![Double Integrals Introduction. Volume and Double Integral z=f(x,y) ≥ 0 on rectangle R=[a,b]×[c,d] S={(x,y,z) in R 3 | 0 ≤ z ≤ f(x,y), (x,y) in R} Volume.](https://static.fdocument.org/doc/330x215/56649f1b5503460f94c30a3a/double-integrals-introduction-volume-and-double-integral-zfxy-0-on.jpg)
