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Calculus1 9 Online
OpenStudy (anonymous):

horizontal asymptote of

OpenStudy (anonymous):

|dw:1425434530843:dw|

OpenStudy (misty1212):

HI!!

OpenStudy (misty1212):

this would depend on if \(x\to \infty\) or if \(x\to -\infty\)

OpenStudy (misty1212):

in other words it has two horizontal asympotes

OpenStudy (misty1212):

the denominator is always positive, but the numerator would be positive as \(x\to \infty\), but negative as \(x\to -\infty\)

OpenStudy (misty1212):

hope it is pretty clear that it is either \(y=1\) or \(y=-1\) depending on which way you go

OpenStudy (zarkon):

\[\frac{x}{\sqrt{x^2+1}}=\frac{x}{\sqrt{x^2(1+\frac{1}{x^2})}}\] \[=\frac{x}{\sqrt{x^2}\sqrt{1+\frac{1}{x^2}}}=\frac{x}{|x|\sqrt{1+\frac{1}{x^2}}}\] \[=sgn(x)\frac{1}{\sqrt{1+\frac{1}{x^2}}}\]

OpenStudy (anonymous):

but either way isnt an infinty divided by infinty infinity?|dw:1425435731732:dw| @misty1212

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