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rbcekz28
@rbcekz28
December 2021
1
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Найдите сумму 1-2+2^2-2^3+.....-2^9
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nigga1337posan
1-2+2^2-2^3+2^4-2^5+2^6-2^7+2^8-2^9
1-2+4-8+16-32+64-128+256-512=1+4+16+64+256-2-8-32-128-512=-341
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1-2+4-8+16-32+64-128+256-512=1+4+16+64+256-2-8-32-128-512=-341