Limits

Sep 2018
19
0
Spain
need these 2 solved

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


lim (-3x^2 + 4x - 2)=
x-->00(infinity)
 
May 2016
1,310
551
USA
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?
 
Sep 2018
19
0
Spain
Yes, I have, but these two still have me a bit confused. :(
 
Last edited by a moderator:
Sep 2018
19
0
Spain
The -x and the -3 confuses me.
 
Last edited by a moderator:

skipjack

Forum Staff
Dec 2006
21,482
2,471
-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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