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Tìm x:
A)11/12+11/12.23+11/23.24+....+11/89.100+x=2/3
B)2/11.13+2/13.15+...+2/19.21-x+221/223=4/3
tìm x, biết
a, \(\left(\frac{11}{12}+\frac{11}{12.23}+\frac{11}{23.24}+...+\frac{11}{89.100}\right)+x=\frac{5}{3}\)
b, \(\left(\frac{2}{11.13}+\frac{2}{13.15}+...+\frac{2}{19.21}\right)-x+4+\frac{221}{231}=\frac{7}{3}\)
tim x biet : (11/12+11/12.23+11/23.24+...+11/89.100) + x = 2/3
tìm x, biết
2/11.13 + 2/13.15 +........2/19.21 -x + 221/231 = 4/3
help mk vs, nhanh lên nha!
tim x biet : (11/12+11/12.23+11/23.24+...+11/89.100) + x = 2/3
giup minh voi minh dang can gap xin cam on nhieu
1,tìm x
a, 4/7+5/7:x=1
b,(2/11. 2/13.15+...+2/19.21) - x + 221/231=4/3
(\(\frac{11}{12}+\frac{11}{12.23}+\frac{11}{23.24}+...+\frac{11}{89.100}\))+x = \(\frac{2}{3}\)
Tìm x biết (2/11.13+2/13.15+...+2/19.21)-x+ 4+221/231=7/3
( 2/11.13 + 2/13.15 + ..... + 2/19.21 ) -x + 221/231 =4/3