Ask Me Help Desk - Investigate the function y=5/(x2 + 1)

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Investigate the function y=5/(x2 + 1) - 1

Y=5
(x2 +1)-1

Do you mean this?

$<br /> y = \frac 5 {x^2+1} -1<br />$

What is it that needs to be investigated? One thing to note is that y=0 if $\frac 5 {x^2+1} \ =\ 1$ , which means the roots of the equation are at $x^2 = 4$ , or $x = \pm 2$ .

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