calculus/materials/01-limits-and-continuity.md
2026-01-01 00:00:00 +00:00

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mat-01-limits-continuity Limits and continuity

Limits and continuity

What is a limit

A limit describes the value that a function approaches as the input approaches a point.

Basic limit laws

If limits exist, they follow linearity, product, quotient, and power laws.

Special limits

Two important special limits are:

  • sin x / x as x approaches 0
  • (1 + 1/n)^n as n grows

Continuity

A function is continuous at a point if the limit equals the function value.

One sided and infinite limits

Sometimes we consider limits from the left or right, or limits that diverge to infinity.