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

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

Question 1199203: How to find the limits of a quadratic function?
lim (x--> 4) g(x)
g(x) = ( )
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(52790) (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.

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