Prove: If f and g are increasing functions on an interval I and I is a subset of R, reals . Show that f+g is an increasing function on I. If f is also strictly increasing on I, then f+g is strictly increasing on I.

Prove: If f and g are increasing functions on an interval I and I is a subset of R, reals . Show that f+g is an increasing function on I. If f is also strictly increasing on I, then f+g is strictly increasing on I.