# continuity proof

• Apr 8th 2007, 05:05 PM
slowcurv99
continuity proof
1)
Define f: R -> R by f(x) = x^2 - 3x + 5. Use the definition of continuity to prove that f is continuous at 2

2)
Prove or give a counterexample: Every sequence of real numbers is a continuous function
• Apr 8th 2007, 05:13 PM
Jhevon
Quote:

Originally Posted by slowcurv99
1)
Define f: R -> R by f(x) = x^2 - 3x + 5. Use the definition of continuity to prove that f is continuous at 2

2)
Prove or give a counterexample: Every sequence of real numbers is a continuous function

there are several definitions for continuity of a function, which are you using in class?
• Apr 8th 2007, 05:20 PM
slowcurv99
Let f: D->R and let c be an element of D. We say that f is continuous at c if for every e>0 there exists a q>0 such that |f(x) - f(c)| < e whenever |x-c| < q and x is an elemend of D.
If f si continuous at each point of a subset S of D, then f is said to be continuous on S. If f is continuous on its domain D, then f is said to be continuous
• Apr 10th 2007, 05:10 PM
ThePerfectHacker
I have absolutely no idea what your question means.