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Algebra - Lanac 2 - ZADATAK 2.

ZADATAK 2. Dokazati jednakost.

\cfrac{b^2c^2}{(a - b)(a - c)} + \cfrac{c^2a^2}{(b - c)(b - a)} + \cfrac{a^2b^2}{(c - a)(c - b)} = ab + bc + ca