tính C=1/3*5+1/5*7+1/7*9+............+1/(2X+1)(2X+3)=15/93
1/3*5+1/5*7+...+1/(2x+1)*(2x+3)=15/93
1/3 x 5 + 1/5 x 7 + 1/7 x 9+ ... + 1/(2x + 1) x (2x + 3) = 15/93.tinh x
Tìm x biết
a) x/2008- 1/10-1/15 -....-1/120=5/8
b) 1/3*5+1/5*7 +.....+1/(2x+1)*(2x+3)= 15/93
Tìm x biết \(\frac{1}{3\times5}+\frac{1}{5\times7}+\frac{1}{7\times9}+...+\frac{1}{\left(2x+1\right)\left(2x+3\right)}=\frac{15}{93}\)
Tìm số tự nhiên x thỏa mãn:
a) 5/1.6 + 5/6.11 +...+ 5/(5x + 1).(5x + 6) = 2010/2011
b) 1/3.5 + 1/5.7 + 1/7.9 +...+ 1/(2x + 1).(2x + 3) = 15/93
Tìm số tự nhiên x thỏa mãn: 5/1.6 + 5/6.11 +...+ 5/(5x+1).(5x+6) =2010/2011. b) 1/3.5+1/5.7+.,.+ 1/(2x+1).(2x+3) =15/93.
Tìm x
a) ( 2x -1)+3/15= 3/2
b) x+ 46/15= 1,5
c) ( -2x +1) + 3/15= 5/3
d) -13/3 -2x -1= 0,6
e) 3x -1/2x = 7/2-3
f) x÷5=6÷7
g) 2x-1/3 = 16/3
a,2/5+3/7+-3/5
b,1-5/7:x=-1/3
c,4/5*(x-1/3)=15/8
d,2/3:(2x+1/8)=7/3
e,2x+3/4=10/3-5/4
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