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November 9th, 2018, 10:01 AM   #1
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Limits

need these 2 solved

lim
x-->1 (-x^3 - x^2 - x - 1)=


lim (-3x^2 + 4x - 2)=
x-->00(infinity)
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November 9th, 2018, 10:48 AM   #2
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Quote:
Originally Posted by raven2k7 View Post
need these 2 solved

lim
x-->1 (-x^3 - x^2 - x - 1)=


lim (-3x^2 + 4x - 2)=
x-->00(infinity)
So what have you tried to do so far?

Have you applied the laws of limits as I suggested in a prior post?
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November 9th, 2018, 10:55 AM   #3
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Yes, I have, but these two still have me a bit confused.

Last edited by skipjack; November 9th, 2018 at 07:19 PM.
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November 9th, 2018, 11:07 AM   #4
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Quote:
Originally Posted by raven2k7 View Post
Yes, I have, but these two still have me a bit confused.
What did you get after applying the law of limits? Can you explain why you are confused?

Last edited by skipjack; November 9th, 2018 at 07:19 PM.
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November 9th, 2018, 11:09 AM   #5
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The -x and the -3 confuses me.

Last edited by skipjack; November 9th, 2018 at 07:20 PM.
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November 9th, 2018, 03:36 PM   #6
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Can you tell us what you tried?

Last edited by skipjack; November 9th, 2018 at 07:20 PM.
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November 9th, 2018, 07:30 PM   #7
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-x^3 is equivalent to -(x³), etc.

If $p(x)$ is a non-constant polynomial in $x$, $\displaystyle \lim_{x\to\infty}p(x)$ doesn't exist (strictly speaking), and $\displaystyle \lim_{x\to k}p(x) = p(k)$.
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