-530=-10-20-40-80-160-320...........................
q = 2
S6 = -10 * ( 2 в 6й степени - 1) : ( 2 - 1) = -630
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-530=-10-20-40-80-160-320...........................
q = 2
S6 = -10 * ( 2 в 6й степени - 1) : ( 2 - 1) = -630