Các câu hỏi tương tự
Tìm y : ( 1/1.3 + 1/3.5 + 1/5.7 + 1/7.9 + 1/9.11 ) .y = 2/3.
A6/1.3.7 + 6/3.7.9 + 6/7.9.13 + 6/9.13.15 + 6/13/15/19Giup mk nhé và làm theo cách dưới :C4/1.3.5 + 4/3.5.7 + 4/5.7.9 + 4/7.9.11 + 4/9.11.13C5-1/1.3.5 + 7-3 /3.5.9 + ............................ + 13-9/9.11.13C5/1.3.5 - 1/1.3.5 + 7/3.5.7 - 3/3.5.7 + ................... + 13/9.11.13 - 9/9.11.13C1/1.3 -1/3.5 + 1/3.5- 1/5.7 + ................................. + 1/9.11 - 1/11.13C1/1.3 - 1/11.13C 11.13/3.11.13 - 3/3.11.13 C140/425
Đọc tiếp
A=6/1.3.7 + 6/3.7.9 + 6/7.9.13 + 6/9.13.15 + 6/13/15/19
Giup mk nhé và làm theo cách dưới :
C=4/1.3.5 + 4/3.5.7 + 4/5.7.9 + 4/7.9.11 + 4/9.11.13
C=5-1/1.3.5 + 7-3 /3.5.9 + ............................ + 13-9/9.11.13
C=5/1.3.5 - 1/1.3.5 + 7/3.5.7 - 3/3.5.7 + ................... + 13/9.11.13 - 9/9.11.13
C=1/1.3 -1/3.5 + 1/3.5- 1/5.7 + ................................. + 1/9.11 - 1/11.13
C=1/1.3 - 1/11.13
C= 11.13/3.11.13 - 3/3.11.13
C=140/425
Giup mk .Mk like bn nào trả lời sóm nhất , đúng nhất .A6/1.3.7 + 6/3.7.9 + 6/7.9.13 + 6/9.13.15 + 6/13.15.19Nếu các bn ko biết giải cách tiểu học thì giải theo sauB4/1.3.5 + 4/3.5.7 + 4/5.7.9 + 4/7.9.11 + 4/9.11.13B5-1/1.3.5 + 7-3/3.5.7 +........+ 13-9/9.11.13B5/1.3.5 - 1/1.3.5 + 7/3.5.7 - 3/3.5.7 +............... + 13/9.11.13 - 9/9.11.13B1/1.3 - 1/3.5 + 1/3.5 - 1/5.7 + ............. + 1/9.11 - 1/11.13B1/1.3-1/11.13B 11.13/3.11.13 - 3/3.11.13 140/425
Đọc tiếp
Giup mk .Mk like bn nào trả lời sóm nhất , đúng nhất .
A=6/1.3.7 + 6/3.7.9 + 6/7.9.13 + 6/9.13.15 + 6/13.15.19
Nếu các bn ko biết giải cách tiểu học thì giải theo sau
B=4/1.3.5 + 4/3.5.7 + 4/5.7.9 + 4/7.9.11 + 4/9.11.13
B=5-1/1.3.5 + 7-3/3.5.7 +........+ 13-9/9.11.13
B=5/1.3.5 - 1/1.3.5 + 7/3.5.7 - 3/3.5.7 +............... + 13/9.11.13 - 9/9.11.13
B=1/1.3 - 1/3.5 + 1/3.5 - 1/5.7 + ............. + 1/9.11 - 1/11.13
B=1/1.3-1/11.13
B= 11.13/3.11.13 - 3/3.11.13 = 140/425
tính tổng :
p= 2/1.3+2/3.5+2.5.7+....................+ 2/49.51
q= 1/1.3+1/3.5+................................... +1/19.21
Tính tổng :
B = 1.2 + 2.3 + 3.4 + ... + 99.100
C = 1.3 +2.4 +3.5 + 4.6 + ... + 9.11
a) 1/1.3+1/3.5+1/5.7
b) 1/1.3+1/3.5+1/5.7+...+1/2007.2009+1/2009.2011
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
A=\(\frac{2}{1.3}\)+\(\frac{2}{3.5}\)+\(\frac{2}{5.7}\)+.......+\(\frac{2}{13.15}\)+\(\frac{2}{15.7}\)
B=\(\frac{4}{1.3}\)+\(\frac{4}{3.5}\)+.......+\(\frac{4}{9.11}\)+\(\frac{4}{11.13}\)