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MathNet 2022-part-05 — 197 problems (EN–VI) Question 10

Math Olympiad Vault · MathNet 2022-part-05 — 197 problems (EN–VI)

Question 10

What is the absolute value of the difference of the solutions of the equation $\left(1-\left(1+x^{-2}\right)^{-1}\right)^{-1}=3.25$?

(A) -3
(B) -1
(C) 1
(D) 3
(E) 0