Sketch the function, showing asymptotes the position and nature of any stationary points.
(a) \(...
Sketch the function, showing asymptotes the position and nature of any stationary points.
(a) \( f(x)=\frac{x^{2}-1}{x^{2}+1} \)
(b) \( f(x)=\frac{x^{2}-6 x+5}{(x+1)^{2}} \)
(c) \( f(x)=\frac{4 x}{x^{2}+1} \)
(d) \( f(x)=\frac{4 x}{(x-1)^{2}} \)
(e) \( f(x)=-2 x+1-\frac{2}{x-2} \)
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