Asked by Chelsey
lim x--->a
x^2+a^2/x+a
I know this equals (a) but I don't know how to explain my answer.
x^2+a^2/x+a
I know this equals (a) but I don't know how to explain my answer.
Answers
Answered by
Reiny
The first thing you should always do in limit problems is to substitute the approach value into the expression.
If you get a real number answer, you are done!
so if x = a
(a^2 + a^2)/(a+a)
= 2a^2/(2a)
= a
Limits only cause problems when
both numerators and denominators are zero
or something becomes undefined
If you get a real number answer, you are done!
so if x = a
(a^2 + a^2)/(a+a)
= 2a^2/(2a)
= a
Limits only cause problems when
both numerators and denominators are zero
or something becomes undefined
Answered by
Chelsey
Thanks! Exactly what I was looking for.
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