Các câu hỏi tương tự
2/2x3+2/3x4+2/4x5+2/5x6+2/6x7+2/7x8+2/8x9+2/9x10
các bạn giúp mình với nhé
\(\frac{1}{1x2}+\frac{1}{2x3}+\frac{1}{3x4}+\frac{1}{4x5}+\frac{1}{5x6}+\frac{1}{6x7}+\frac{1}{7x8}+\frac{1}{8x9}+\frac{1}{9x10}\)
(x+1/2x3)+(X+1/3x4)+(X+1/4x5)+(X+1/5x6)=25/3
a)1,27+2,77+4,27+5,77+...+31,27+32,77
b)1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8 +1/8x9+1/9x10
mình cần gấp
A = 2002+2004+2006+...+2014/ 1/3x4+1/4x5+1/5x6+...+1/20x21
Tính nhanh: 3/1x2+3/2x3+3/3x4+3/4x5+3/5x6+...+3/9x10+77/2x9+77/9x16+77/16x23+...+77/93x100
Giúp mình với nhé!
1. Tính
a) 5/7 x 4 : 5/9
b) 8 x 2/3 : 1/2
c) 6 : 3/5 - 7/6 x 6/7
21/5 x 10/11 + 57/11
2. Tìm x
a) 35/9 : x = 35/6
b) (1/1x2 + 1/2x3 + 1/3x4 +1/4x5 +1/5x6) x 10- x = 0
1/3x4+1/4x5+1/5x6+...+1/11x12=x?
1/3x4 + 1/4x5 + 1/5x6 + ... + 1/20x21 = x/14