12 tháng 8 2022 lúc 21:26
Các câu hỏi tương tự
c, C = 2/1.3 + 2/3.5 + 2/5.7 + .......+ 2/69.71+ 2/71.73
tính tổng sau
M=2/1.3+2/3.5+2/5.7+...+2/99.101
A=7/10.11+7/11.12+7/12+13+...7/69.70
B=1/25.27+1/27.29+1/29.31+...+1/73.75
Bài 1 : Tính nhanh
a, 0,36 .350 + 1,2 .20 . 3 + 9 . 4 . 4,5
b, B = 2015.2016-5/2015.2015+2010
c, C = 2/1.3 + 2/3.5 + 2/5.7 + .......+ 2/69.71+ 2/71.73
d, D= (1+1/2) . ( 1+1/3) . (1+1/4) ...... (1+1/2017) . (1+1/2018)
e, E=1/4.5 + 1/5.6 + 1/6.7+........+1/79.80+1/80.81
f, F=3/2.3 + 3/3.4 + 3/4.5 + .......+ 3/99.100
g, G= 5/1.4 + 5/4.7 + 5/7.10 + .......+5/61.64
nhanh nha , mk cần gấp
Tính tổng:
A= 2/1.3 +2/3.5 +2/5.7 +......+2/97.99
2/1.3+14/3.5+34/5.7+.......+322/17.19 =?
2/1.3+14/3.5+34/5.7+......+ 622/17.19 =?
A = 1/1.3 + 1/3.5 + 1/5.7 + . . . + 1/55.57
b = 1/4 +1/28 + 1/70 + ...+1/58.61
c = 2/ 3.8 + 2/8.13 + 2/13.18 + . . . + 2/498.503
~chọn 1 trong 3 câu để làm ạ~
1/1.3 + 1/3.5 + 1/5.7 +...+ 1/x.(x+2) = 20/41
1/1.3 + 1/3.5 + 1/5.7 +...+ 1/x.(x+2) = 20/41
Tính nhanh: \(\frac{2}{1.3}+\frac{2}{3.5}+\frac{2}{5.7}+...+\frac{2}{77.79}\)