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Mathematics 15 Online
OpenStudy (anonymous):

limit approaches infinity (3/x^2 - 2/x) / (2/x^2 + 7/x) I feel like the limit doesn't exist. Can someone help1

OpenStudy (anonymous):

Yeah your right the limit doesn't exist.

OpenStudy (ranga):

The limit as x approaches infinity exists.

OpenStudy (anonymous):

I go up till lim x--> infinity 3 - 2x / 2 + 7x

OpenStudy (ranga):

Correct. Factor x out of numerator and denominator. They will cancel out. Then try x->infinity.

OpenStudy (ranga):

\[\frac{ 3-2x }{ 2+7x } = \frac{ x(3/x-2) }{ x(2/x+7) } = \frac{ 3/x-2 }{ 2/x+7}\]

OpenStudy (ranga):

When x-> infinity, 3/x -> 0 and 2/x -> 0 above.

OpenStudy (anonymous):

thank you very much :)

OpenStudy (ranga):

You are welcome.

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