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Mathematics, 14.12.2021 18:30 StevencoolGG

Cho chuỗi số ∑n=1+∞3n−15n có tổng riêng Sn=15+15.35+15.(35)2+...+15.(35)n−1 . Tổng của chuỗi số đã cho là:

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Cho chuỗi số ∑n=1+∞3n−15n có tổng riêng Sn=15+15.35+15.(35)2+...+15.(35)n−1 . Tổng của chuỗi số đã c...
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