Tìm x biết:
1/5.8+1/8.11+1/11.14+......+1/x(x+3)=98/1545
Tìm x biết:
1/ 5.8+ 1/ 8. 11+ .....+ 1/ x(x+3)= 101/ 1540
tìm x biết 1/5.8+1/8.11+1/11.14+..............+1/x[x+3]=101/1540
Tìm x biết:
3.x/2.5+3.x/5.8+3.x/8.11+3.x/11.14=1/21
tìm x biết
1/5.8+1/8.11+1/11.14+...+1/x(x+3)=101/15401+1/3+1/6+1/10+...+1/x(x+1):2=1 1991/1993Tìm x , biết : \(\frac{1}{5.8}+\frac{1}{8.11}+\frac{1}{11.14}+...+\frac{1}{x.(x+3)}=\frac{101}{1504} \)
1/5.8 + 1/8.11 + 1/11.14 + ........+1/x.[x+3] = 101/1540
Bài 1: Tìm x biết
x + 3/5.8 + 3/8.11 + 3/11.14 + ... + 3/32.35 = -2/7
tìm số tự nhiên x biết
1/5.8+1/8.11+.....=1/x.(x+1)=1/18