SOLUTION: How to find the limits of a quadratic function? lim (x--> 4) g(x) g(x) = ( {{{x^2 - 16 }}} ) I thought it would be DNE because I thought 4^+ would be - infinity and 4^- wo

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: How to find the limits of a quadratic function? lim (x--> 4) g(x) g(x) = ( {{{x^2 - 16 }}} ) I thought it would be DNE because I thought 4^+ would be - infinity and 4^- wo      Log On


   

Question 1199203: How to find the limits of a quadratic function?
lim (x--> 4) g(x)
g(x) = ( x%5E2+-+16+ )
I thought it would be DNE because I thought 4^+ would be - infinity and 4^- would be + infinity. But the answer is 0 and I don't understand why.
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

To find the limit of a quadratic function,  simply substitute the value of the argument
into the quadratic function;  then calculate its value.


It works,  because  EVERY  quadratic function is a  CONTINUOUS  function.