\(\frac{7}{x}+\frac{4}{5.9}+\frac{4}{9.13}+...+\frac{4}{41.45}=\frac{29}{45}\)
\(\frac{7}{x}+\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{9}-\frac{1}{13}+...+\frac{1}{41}-\frac{1}{45}\right)=\frac{29}{45}\)
\(\frac{7}{x}+\left(\frac{1}{5}-\frac{1}{45}\right)=\frac{29}{45}\)
\(\frac{7}{x}+\frac{8}{45}=\frac{29}{45}\)
\(\frac{7}{x}=\frac{29}{45}-\frac{8}{45}\)
\(\frac{7}{x}=\frac{7}{15}\)
vậy x=15. k cho mình nha
Tìm x biết : 7/x + 4/5.9+4/9.13+4/13.17+...+4/41.45=29/45
tìm x, y thỏa mãn:
a. \(\frac{7}{x}+\frac{4}{5.9}+\frac{4}{9.13}+\frac{4}{13.17}+....+\frac{4}{41.45}=\frac{29}{45}\)
tìm stn x thỏa mãn
a. 7/x+4/5.9+4/9.13+4/13.17+...+4/41.45=29/45
b. 1/3.5+1/5.7+1/7.9+...+1/(2x+1)(2x+3)=15/93
7/x+(4/5.9+4/9.13+4/13.17+..+4/41.45)=29/45
Ai nhanh mk tick
Tìm x
a. x/2008-1/10-1/15-1./21-...-1/120=5/8
b. 7/x+4/5.9+4/9.13+4/13.17+.....+4/41.45=29/45
Tìm x biết x + 4/5.9+4/9.13+4/13.17+...+4/41.45=-37/45
Tìm x biết x+4/5.9 + 4/9.13 +4/13.17 +...............+ 4/41.45 = -37/45
Tìm x .
x + 4/5.9 + 4/9.13 + 4/13.17 + ... + 4/41.45 = -37/45
Tìm x, biết
x + 4/5.9 + 4/9.13 + 4/13.17 +.....+ 4/41.45 = -37/45
