Find the limit: lim (x -> 2) (x^2 - 4)/(x - 2)

Practice Questions

Q1
Find the limit: lim (x -> 2) (x^2 - 4)/(x - 2)
  1. 0
  2. 2
  3. 4
  4. Undefined

Questions & Step-by-Step Solutions

Find the limit: lim (x -> 2) (x^2 - 4)/(x - 2)
  • Step 1: Identify the limit we want to find: lim (x -> 2) (x^2 - 4)/(x - 2).
  • Step 2: Notice that the expression (x^2 - 4) can be rewritten using the difference of squares: (x^2 - 4) = (x - 2)(x + 2).
  • Step 3: Substitute this factorization into the limit: lim (x -> 2) ((x - 2)(x + 2))/(x - 2).
  • Step 4: Since (x - 2) is in both the numerator and the denominator, we can cancel it out, but only for x ≠ 2: lim (x -> 2) (x + 2).
  • Step 5: Now, we can directly substitute x = 2 into the simplified expression: (2 + 2) = 4.
  • Step 6: Therefore, the limit is 4.
  • Limit Evaluation – Understanding how to evaluate limits, especially when dealing with indeterminate forms.
  • Factoring and Simplification – The ability to factor expressions and simplify them to resolve limits.
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