Limits Cheat Sheet - Except we require x large and negative. What happens when we use direct substitution? The limit of f(x) as x approaches a: The limit doesn't exist (probably an asymptote). © 2005 paul dawkins limits definitions precise definition : The value to which the output (dependent variable) of f(x) approaches as x (independent variable) approaches the number a. There is a similar definition for lim f(x) = l. Same definition as the limit except it requires x > a. G ( x) = x − 3 x + 5 − 3. The limit doesn't exist (probably an asymptote).
© 2005 paul dawkins limits definitions precise definition : The limit exists, and we found it! We say lim ( ) xa f x l → = if for every ε>0 there is a δ>0such that whenever 0<−<xa δ then f x l( )−< ε. Web we can make f(x) as close to l as we want by taking x sufficiently close to a (on either side of a) without letting x = a. The limit exists, and we found it! Except we require x large and negative. The limit doesn't exist (probably an asymptote). G ( x) = x − 3 x + 5 − 3. We want to find lim x → 4 g ( x). The limit doesn't exist (probably an asymptote). Same definition as the limit except it requires x > a. There is a similar definition for lim f(x) = l. We say lim ( ) xa f x l → = The value to which the output (dependent variable) of f(x) approaches as x (independent variable) approaches the number a. What happens when we use direct substitution? The limit of f(x) as x approaches a: