Expresie naturala

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alex2008
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Joined: Sun Oct 19, 2008 3:23 pm
Location: Tulcea

Expresie naturala

Post by alex2008 »

Daca a, b, c, d sunt naturale diferite de zero si ad+bc=bd , aratati ca valoarea expresiei \( \frac{a^{1998}}{b^{1998}}+\frac{a^{1997}}{b^{1997}}\cdot\frac{c}{d}+ . . . +\frac{a^2c}{b^2d}+\frac{ac}{bd}+\frac{c}{d} \) este un numar natural
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