Evaluate the limit: lim (x -> 0) (ln(1 + x)/x)

Practice Questions

Q1
Evaluate the limit: lim (x -> 0) (ln(1 + x)/x)
  1. 0
  2. 1
  3. Infinity
  4. Undefined

Questions & Step-by-Step Solutions

Evaluate the limit: lim (x -> 0) (ln(1 + x)/x)
  • Step 1: Identify the limit we want to evaluate: lim (x -> 0) (ln(1 + x)/x).
  • Step 2: Check if the limit is in an indeterminate form. As x approaches 0, ln(1 + x) approaches ln(1) which is 0, and x approaches 0. So we have 0/0, which is indeterminate.
  • Step 3: Apply L'Hôpital's Rule, which states that if you have an indeterminate form like 0/0, you can take the derivative of the numerator and the derivative of the denominator.
  • Step 4: Differentiate the numerator: The derivative of ln(1 + x) is 1/(1 + x).
  • Step 5: Differentiate the denominator: The derivative of x is 1.
  • Step 6: Rewrite the limit using the derivatives: lim (x -> 0) (1/(1 + x))/1.
  • Step 7: Simplify the expression: lim (x -> 0) (1/(1 + x)).
  • Step 8: Substitute x = 0 into the simplified expression: 1/(1 + 0) = 1.
  • Step 9: Conclude that the limit is 1.
  • Limits and Continuity – Understanding how to evaluate limits, especially those that result in indeterminate forms.
  • L'Hôpital's Rule – Applying L'Hôpital's Rule to resolve limits that yield 0/0 or ∞/∞ forms.
  • Natural Logarithm Properties – Utilizing properties of logarithms to simplify expressions before taking limits.
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