trying to ascend
Oldcel KHHV
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Consider the real function f, defined by f(x) = - 2/x and two circumferences C1 and C2, with centers in the origin. It's known that C1 is tangent to the graphic of F, and that the point of X = -1/2 belongs to both C2 and the graphic. Given that, what's the size of the annulus defined by C1 and C2?