cho M= 1/15+1/105+1/315+...+ 1/1997. So sanh M vs 12
Cho M= 1/15 + 1/105 + 1/315+....+1/9177. So sanh M vs 12.
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Cho M=1/15+1/105+1/315+...+1/9177
So sánh M với 1/12
Cho M = 1/15+1/105+1/315+.............+1/9177. So sánh M với 1/2
1) Cho M=\(\frac{1}{15}\)+\(\frac{1}{105}\)+\(\frac{1}{315}\)+...+\(\frac{1}{9177}\)
So sánh M với \(\frac{1}{12}\)
M=\(\frac{1}{15}\)+\(\frac{1}{105}\)+\(\frac{1}{315}\)+...+\(\frac{1}{9177}\)
So sánh M với \(\frac{1}{12}\)
Cho M=1/2-1/2^2+1/25-1/2^4=....-1/2^99+1/2^101. so sanh M vs 2^101-1/3.2^101
tính tổng sau 1/15+1/105+1/315+..+1/2145
Cho S = 1/11 + 1/12 + 1/13 + 1/14 + 1/15 + 1/16 + 1/17 + 1/18 + 1/19 + 1/20.
Hay so sanh S va 1/2