$$1 + r + r + r = 00$$
$r=-\frac{1}{3}\approx -0.333333333$
$$1+2r+r=0\times 0$$
$$1+3r=0\times 0$$
$$1+3r=0$$
$$3r=-1$$
$$r=\frac{-1}{3}$$
$$r=-\frac{1}{3}$$
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