October 2018 1 289 Report

Liczba 2 jest pierwiastkiem równania:

A. x-5/x-4 = x+1/x

B. x+1/x = x+3/x+1

C. x/x-1 = x/2x-1

D. x+2/2x+1 = 2/x+1

proszę o wytłumaczenie


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