Module 1
4 lessons
Limits and Continuity
Understand what a function approaches before calculus starts moving.
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Theory 1 of 7
Core idea
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What this lesson is about
A limit describes the value a function gets close to as x approaches a target, even when the function is not defined there.
Use direct substitution first. If it works, the limit is usually immediate.
When substitution gives 0/0, simplify algebraically before substituting again.
Continuity at x = a means the function value exists, the limit exists, and both are equal.
Continue through the theory first