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EGVentures
a fost răspuns

Fie A = 1 + 1/2 + 1/3 + 1/4 + 1/2006 + 1/2 + 2/3 + 3/4 +...+ 2005/2006 si B = 12/48 + 102/408 + 1002/4008 + 10002/40008​
Calculati A - B, A la puterea B, B la puterea A