Progresie geometrica, ratia q=2, primul termen 2
¨0, ultimul 2^1997, cu 1998 de termeni
a= 1x(2^1998 -1):(2-1) = 2^1998 -1
b= ((2^6))^333 - 1= 2^1998 - 1
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a-b=2^1998 -1 -2^1998 + 1 = 0.
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Succes in continuare!
