This calculus video tutorial explains how to find the limit of a polynomial function using direct substitution.
Introduction to Limits:
https://www.youtube.com/watch?v=YNstP0ESndU&t=3s
Evaluating Limits By Factoring:
https://www.youtube.com/watch?v=fOrOeZA-vdY
Limits of Rational Functions:
https://www.youtube.com/watch?v=M2BgBG2Su94
Limits at Infinity:
https://www.youtube.com/watch?v=sjLFl7Z8W_I&t=2s
Infinite Limits:
https://www.youtube.com/watch?v=xvFqomOpLrs
Limits of Trigonometric Functions:
https://www.youtube.com/watch?v=HbtuSC_WOW0
The Squeeze Theorem With Limits:
https://www.youtube.com/watch?v=lVIb9iJ-rRI&t=1s
How To Evaluate Limits From a Graph:
https://www.youtube.com/watch?v=7Q2HwTHcxA0
Limits and Continuity:
https://www.youtube.com/watch?v=JrYmEo6hoiU&t=1s
3 Step Continuity Test:
https://www.youtube.com/watch?v=WT7oxiiFYt8&t=1s
