1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Limits of functions with negative exponents

  1. Sep 8, 2010 #1
    1. The problem statement, all variables and given/known data

    lim h->0 [(11+h)^-1 - 11^-1]/h

    2. Relevant equations

    3. The attempt at a solution

    I made the numerator into two fractions with the denominator h. After combining the fractions in the numerator I was left with 121 when I put in 0 for h.
  2. jcsd
  3. Sep 9, 2010 #2


    Staff: Mentor

    You have a sign error. Check your work.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook