Consider the function .

MATHEMATICS · Multi-part · AoPS · Mathematics · Special Functions · Special Functions

Problem

Consider the function f(x)=2x+1x−1f(x) = \frac{2x+1}{x-1} . (1) Find the vertical asymptote of the function. (2) Find the axes intercepts. (3) Rearrange the function to find the horizontal asymptote. (4) Draw a sign diagram of the function. (5) Hence discuss the behaviour of the function near the asymptotes. (6) Sketch the function, showing the features you have found.

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