Các câu hỏi tương tự
tìm x biết \(\frac{x}{6}+\frac{x}{10}+\frac{x}{15}+\frac{x}{21}+\frac{x}{28}+\frac{x}{36}+\frac{x}{45}+\frac{x}{55}+\frac{x}{66}+\frac{x}{78}+\frac{x}{78}=\frac{220}{39}\)
frac{x+1}{10}+frac{x+1}{11}+frac{x+1}{12}frac{x+1}{13}+frac{x+1}{14}frac{x+4}{2006}+frac{x+3}{2007}frac{x+2}{2008}+frac{x+1}{2009}frac{x+1945}{45}+frac{x+1954}{54}frac{x+1975}{75}+frac{x+1969}{69}frac{x-99}{5}+frac{x-97}{7}frac{x-95}{9}+frac{x-93}{11}frac{x+2008}{10}+frac{x+2010}{9}frac{x+2012}{8}+frac{x+2014}{7}
Đọc tiếp
\(\frac{x+1}{10}+\frac{x+1}{11}+\frac{x+1}{12}=\frac{x+1}{13}+\frac{x+1}{14}\)\(\frac{x+4}{2006}+\frac{x+3}{2007}=\frac{x+2}{2008}+\frac{x+1}{2009}\)\(\frac{x+1945}{45}+\frac{x+1954}{54}=\frac{x+1975}{75}+\frac{x+1969}{69}\)\(\frac{x-99}{5}+\frac{x-97}{7}=\frac{x-95}{9}+\frac{x-93}{11}\)\(\frac{x+2008}{10}+\frac{x+2010}{9}=\frac{x+2012}{8}+\frac{x+2014}{7}\)
Bài 1:TÌM x:a,frac{1}{3}+frac{1}{6}+frac{1}{10}+...+frac{2}{x.left(x+1right)}frac{2}{2013}b,frac{x+4}{2000}+frac{x+3}{2001}frac{x+2}{2002}+frac{x+1}{2003}c,frac{x+5}{205}+frac{x+4}{204}+frac{x+3}{203}frac{x+166}{366}+frac{x+167}{367}+frac{x+168}{368} d, x.frac{frac{1}{2}+frac{1}{3}+frac{1}{4}+...+frac{1}{2011}+frac{1}{2012}}{frac{2011}{1}+frac{2011}{2}+frac{2010}{3}+frac{2009}{4}+...+frac{2}{2011}+frac{1}{2012}}1
Đọc tiếp
Bài \(1:\)TÌM \(x:\)
\(a,\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x.\left(x+1\right)}=\frac{2}{2013}\)
\(b,\frac{x+4}{2000}+\frac{x+3}{2001}=\frac{x+2}{2002}+\frac{x+1}{2003}\)
\(c,\frac{x+5}{205}+\frac{x+4}{204}+\frac{x+3}{203}=\frac{x+166}{366}+\frac{x+167}{367}+\frac{x+168}{368}\)
\(d,\) \(x.\)\(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2011}+\frac{1}{2012}}{\frac{2011}{1}+\frac{2011}{2}+\frac{2010}{3}+\frac{2009}{4}+...+\frac{2}{2011}+\frac{1}{2012}}=1\)
Tìm x, biết:
a) \(\frac{x+1}{35}+\frac{x+3}{33}=\frac{x+5}{31}+\frac{x+7}{29}\)
b) \(\frac{x-10}{1994}+\frac{x-8}{1996}+\frac{x-6}{1998}+\frac{x-4}{2000}+\frac{x-2}{2002}=\frac{x-2002}{2}+\frac{x-2000}{4}+\frac{x-1998}{6}+\frac{x-1996}{8}+\frac{x-1994}{10}\)
TÍNHfrac{1+0,6-frac{3}{7}}{frac{8}{3}+frac{8}{5}-frac{8}{7}}-frac{frac{1}{3}+0,25-frac{1}{5}+0,125}{frac{7}{6}+frac{7}{8}-0,7+frac{7}{16}}TÌM Xa) frac{59-x}{41}+frac{57-x}{43}+frac{55-x}{45}+frac{53-x}{47}+frac{51-x}{49}-5b) frac{x-5}{1990}+frac{x-15}{1980}+frac{x-25}{1970}frac{x-1990}{5}+frac{x-1980}{15}+frac{x-1570}{25}CÁC BẠN GIÚP MK NHÉ! CẢM ƠN CÁC BẠN NHÌU NHA!
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TÍNH
\(\frac{1+0,6-\frac{3}{7}}{\frac{8}{3}+\frac{8}{5}-\frac{8}{7}}-\frac{\frac{1}{3}+0,25-\frac{1}{5}+0,125}{\frac{7}{6}+\frac{7}{8}-0,7+\frac{7}{16}}\)
TÌM X
a) \(\frac{59-x}{41}+\frac{57-x}{43}+\frac{55-x}{45}+\frac{53-x}{47}+\frac{51-x}{49}=-5\)
b) \(\frac{x-5}{1990}+\frac{x-15}{1980}+\frac{x-25}{1970}=\frac{x-1990}{5}+\frac{x-1980}{15}+\frac{x-1570}{25}\)
CÁC BẠN GIÚP MK NHÉ! CẢM ƠN CÁC BẠN NHÌU NHA!
Tìm x biết
a) \(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{47.49}=\frac{24}{x+1}\)
b) \(\frac{4}{1.5}+\frac{4}{5.9}+\frac{4}{9.13}+...+\frac{4}{97.101}=\frac{2x+4}{101}\)
c) \(\frac{x-1}{2017}+\frac{x-2}{2016}=\frac{x-3}{2015}+\frac{x-4}{2014}\)
d) \(\frac{x+1}{2017}+\frac{x+2}{2016}=\frac{x+3}{2015}+\frac{x+4}{2014}\)
Tìm x thoả mãn:a)frac{1}{2}x-frac{3}{4}x-frac{7}{3}-frac{5}{6}b)frac{4}{5}x-x-frac{3}{2}x+frac{4}{3}frac{1}{2}-frac{6}{5}c)frac{1}{1.2}+frac{1}{2.3}+......+frac{1}{x.left(x+1right)}frac{2009}{2010}d)frac{1}{3}+frac{1}{6}+frac{1}{10}+...+frac{2}{xleft(x+1right)}1frac{2013}{2015}e)frac{1}{3.5}+frac{1}{5.7}+.....+frac{1}{left(2x+1right)left(2x+3right)}frac{100}{609}
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Tìm x thoả mãn:
a)\(\frac{1}{2}x-\frac{3}{4}x-\frac{7}{3}=-\frac{5}{6}\)
b)\(\frac{4}{5}x-x-\frac{3}{2}x+\frac{4}{3}=\frac{1}{2}-\frac{6}{5}\)
c)\(\frac{1}{1.2}+\frac{1}{2.3}+......+\frac{1}{x.\left(x+1\right)}=\frac{2009}{2010}\)
d)\(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x\left(x+1\right)}=1\frac{2013}{2015}\)
e)\(\frac{1}{3.5}+\frac{1}{5.7}+.....+\frac{1}{\left(2x+1\right)\left(2x+3\right)}=\frac{100}{609}\)
\(\frac{x-25}{1979}-\frac{x-24}{1980}-\frac{x-23}{1981}-\frac{x-22}{1982}=\frac{x-1979}{25}-\frac{x-1980}{24}-\frac{x-1981}{23}-\frac{x-1982}{22}\)
Tìm x, biết:
\(a)\frac{x+1}{65}+\frac{x+2}{64}=\frac{x+3}{63}+\frac{x+4}{62}\)
\(b)\frac{x-5}{100}+\frac{x-4}{101}+\frac{x-3}{102}=\frac{x-100}{5}+\frac{x-101}{4}+\frac{x-102}{3}\)
Bài 2: a.Tínhfrac{1}{4}-frac{1}{7}frac{3}{4.7};_{ }_{ }frac{1}{7}-frac{1}{10}frac{3}{7.10};_{ }_{ }frac{1}{10}-frac{1}{13}frac{3}{10.13};_{ }_{ }frac{1}{13}-frac{1}{16}frac{3}{13.16};_{ }....._{ }frac{1}{x}-frac{1}{x+3}frac{3}{xleft(x+3right)}Qui luật: frac{m}{aleft(a+mright)}frac{1}{a}-frac{1}{a+m}b. A frac{1}{4.7}+frac{1}{7.10}+frac{1}{10.13}+...+frac{1}{xleft(x+3right)} 3A frac{3}{4.7}+frac{3}{7.10}+frac{3}{10.13}+...+frac{3}{xleft(x+3right)} 3A frac{1}{4}-frac{1}{7}+frac{1}{7}-frac{1}{...
Đọc tiếp
Bài 2: a.Tính
\(\frac{1}{4}-\frac{1}{7}=\frac{3}{4.7};_{ }_{ }\frac{1}{7}-\frac{1}{10}=\frac{3}{7.10};_{ }_{ }\frac{1}{10}-\frac{1}{13}=\frac{3}{10.13};_{ }_{ }\frac{1}{13}-\frac{1}{16}=\frac{3}{13.16};_{ }....._{ }\frac{1}{x}-\frac{1}{x+3}=\frac{3}{x\left(x+3\right)}\)Qui luật: \(\frac{m}{a\left(a+m\right)}=\frac{1}{a}-\frac{1}{a+m}\)
b. A = \(\frac{1}{4.7}+\frac{1}{7.10}+\frac{1}{10.13}+...+\frac{1}{x\left(x+3\right)}\)
3A = \(\frac{3}{4.7}+\frac{3}{7.10}+\frac{3}{10.13}+...+\frac{3}{x\left(x+3\right)}\)
3A = \(\frac{1}{4}-\frac{1}{7}+\frac{1}{7}-\frac{1}{10}+\frac{1}{10}-\frac{1}{13}+...+\frac{1}{x}-\frac{1}{x+3}\)
3 A = \(\frac{1}{4}-\frac{1}{x+3}\)
\(\frac{63}{764}.3=\frac{1}{4}-\frac{1}{x+3}\)
\(\frac{189}{764}=\frac{1}{4}-\frac{1}{x+3}\)
\(\frac{1}{382}=\frac{1}{x+3}_{ }_{ }_{ }=>x=382-3=379\)