Limit

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Limit describes that a function approaches as the input approaches to some value. Limits are used to define derivatives, integrals and continuity.
One sided limits are also used here. A variable approaches a fixed point either from above or below.
Example: x → 3+ or x → 3 -
Limit of a function can be found by comparison with two other functions. This is the squeeze theorem.
Example 1:
Limit
(a) 0        (b) 1         (c) Not defined          (d) 1/2
Answer: d
Explanation:
Limit
 
Example 2:
Limit
(a) 1         (b) 0         (c) Not defined          (d) -2
Answer:
Limit
 

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