Find the limit: lim (x -> 0) (e^x - 1)/x

Practice Questions

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

Questions & Step-by-Step Solutions

Find the limit: lim (x -> 0) (e^x - 1)/x
  • Step 1: Understand the limit we want to find: lim (x -> 0) (e^x - 1)/x.
  • Step 2: Recognize that as x approaches 0, both the numerator (e^x - 1) and the denominator (x) approach 0. This is an indeterminate form (0/0).
  • Step 3: To resolve this, we can use L'Hôpital's Rule, which states that if we have an indeterminate form, we can take the derivative of the numerator and the derivative of the denominator.
  • Step 4: Find the derivative of the numerator e^x - 1. The derivative of e^x is e^x, and the derivative of -1 is 0. So, the derivative of the numerator is e^x.
  • Step 5: Find the derivative of the denominator x. The derivative of x is 1.
  • Step 6: Now apply L'Hôpital's Rule: lim (x -> 0) (e^x - 1)/x = lim (x -> 0) e^x/1.
  • Step 7: Evaluate the limit: as x approaches 0, e^x approaches e^0, which is 1.
  • Step 8: Therefore, lim (x -> 0) (e^x - 1)/x = 1.
  • Limit of a Function – Understanding how to evaluate the limit of a function as it approaches a specific point, particularly using derivatives.
  • Derivative Interpretation – Using the definition of the derivative to find limits, particularly for exponential functions.
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