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: HELP: Limit of absolute value

  1. Sep 26, 2004 #1
    Compute the limit of: (absolute value)

    f(x) = 4 (absolute value of x + 4) / (x+4)

    as x approaches -4 from the right.

    I got 4 because x>-4. Am I right?
     
  2. jcsd
  3. Sep 26, 2004 #2
    Yep that's correct! When [tex]x > 4, |x + 4| = x + 4[/tex]
    Thus,

    [tex]lim_{x \rightarrow -4^+} f(x) = lim_{x \rightarrow -4^+} 4\frac{x+4}{x+4} = 4[/tex]
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook