Intoduction of Limits

   Definition of Limits: 

• If f(x) becomes arbitrarily close to a unique numeb L as x approaches c from either side, the limit of f(x) as a approaches c is L. 

   Conditions under which Limits do not exist:

• f(x) approaches a different number from the right side of c than from the left side of c
• f(x) incereses or decreases without bound as x approaches c
• f(x) oscillates between tweo fixed values as x approaches c