Các câu hỏi tương tự
11/5.7+11/7.9+11/9.11+......+11/59.61
Tính A = 5/5.7 + 5/7.9 + 5/9.11 + ...... + 5/59.61
\(a)\dfrac{11}{5.7}+\dfrac{11}{7.9}+\dfrac{11}{9.11}+...+\dfrac{11}{59.61} \)
S=3/5.7+3/7.9+...+3/59.61
3/5.7 + 3/7.9 +....+ 3/59.61 = ?
Tính nhanh
3/5.7 + 3/7.9 + ...+ 3/59.61
M= 3/5.7 + 3/7.9+… +3/59.61
M=?
Tính:
a) M=2/3.5+2/5.7+2/7.9+...+2/97.99
b) N=3/5.7+3/7.9+3/9.11+...+3/197.199
Tính tổng: S = 3/5.7+3/7.9+.........................+3/59.61