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Cho cấp số cộng (u_n ) có số hạng đầu bằng 1 và tổng 100 số hạng đầu bằng 14950
7 months ago
25
Cho cấp số cộng (u_n ) có số hạng đầu bằng 1 và tổng 100 số hạng đầu bằng 14950.Tính tổng
1/(u_1 u_2 )+1/(u_2 u_3 )+⋯+1/(u_49 u_50 )
#ArithmeticProgression
#CapSoCong
#ToanLop11
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