using infinity to use L'Hôpitals rule: lim[x->infty](3x^5-2x^3+4)/(3+x-4x^5)
Goodday,
I am currently having problems solving the following limit:
. . . . .\(\displaystyle \large{\displaystyle \lim_{x \rightarrow \infty}\, \left(\dfrac{3x^5\, -\, 2x^3\, +\, 4}{3\, +\, x\, -\, 4x^5}\right)}\)
I'd like to solve this using L'Hôpitals rule. For this this to be possible the equation needs to equal \(\displaystyle \infty/\infty\), which it should.
However when I try to fill in the equation using \(\displaystyle \infty,\) Ifail to see why this would result in \(\displaystyle \infty/\infty\)
I have been taught that \(\displaystyle \infty\, +\, \infty\, =\, \infty,\) and \(\displaystyle \infty\, -\, \infty\) is undefined.
Goodday,
I am currently having problems solving the following limit:
. . . . .\(\displaystyle \large{\displaystyle \lim_{x \rightarrow \infty}\, \left(\dfrac{3x^5\, -\, 2x^3\, +\, 4}{3\, +\, x\, -\, 4x^5}\right)}\)
I'd like to solve this using L'Hôpitals rule. For this this to be possible the equation needs to equal \(\displaystyle \infty/\infty\), which it should.
However when I try to fill in the equation using \(\displaystyle \infty,\) Ifail to see why this would result in \(\displaystyle \infty/\infty\)
I have been taught that \(\displaystyle \infty\, +\, \infty\, =\, \infty,\) and \(\displaystyle \infty\, -\, \infty\) is undefined.
So I see why \(\displaystyle 3x^5\, -\, 2x^3\, +\, 4\, =\, \infty,\) but not why 3 + x - 4x^(5) = \(\displaystyle \infty.\)
If anything should this not be zero because \(\displaystyle 4\, \times\, \infty^5\) seems to me a bigger number than \(\displaystyle \infty,\) so that \(\displaystyle 3\, +\, \infty\, -\, 4\, \times\, \infty^5\, =\, 0\)
I know I am not suppose to think like this because "infinity" isn't a number, but still it does not make sense to me.
Thank you.
I know I am not suppose to think like this because "infinity" isn't a number, but still it does not make sense to me.
Thank you.
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