Giải phương trình \(\frac{x+19}{27}-\frac{x+17}{29}=\frac{x+15}{31}-\frac{x+13}{33}\)
Giải phương trình sau;
a) \(125x^3-\left(2x+1\right)^3-\left(3x-1\right)^3=0\)
b) \(\left(x-1\right)^3+\left(x+1\right)^3=8\left(x-1\right)^3\)
c) \(\frac{x+19}{27}+\frac{x+17}{29}=\frac{x+15}{31}-\frac{x+13}{33}\)
Giải các phương trình sau:
a) \(125x^3-\left(2x+1\right)^3-\left(3x-1\right)^3=0\)
b) \(\left(x-1\right)^3+\left(x+1\right)^3=8\left(x-1\right)^3\)
c)\(\frac{x+19}{27}+\frac{x+17}{29}=\frac{x+15}{31}-\frac{x+13}{33}\)
Giải phương trình sau:
a) \(125x^3-\left(2x+1\right)^3-\left(3x-1\right)^3=0\) \(\)
b) \(\left(x-1\right)^3+\left(x+1\right)^3=8\left(x-1\right)^3\)
c) \(\frac{x+19}{27}+\frac{x+17}{29}=\frac{x+15}{31}-\frac{x+13}{33}\)
Giải các bất phương trình sau:
a) \(\frac{x-5}{2005}+\frac{x-15}{1995}< \frac{x-2005}{5}+\frac{x-1995}{15}\)
b)\(\frac{1987-x}{15}+\frac{1988-x}{16}+\frac{27+x}{1999}+\frac{28+x}{2000}>4\)
Giải các phương trình sau : ( biến đổi đặc biệt )
a) \(\frac{x+1}{65}\) + \(\frac{x+3}{63}\)= \(\frac{x+5}{61}\)+ \(\frac{x+7}{59}\)
b) \(\frac{x+29}{31}\)- \(\frac{x+27}{33}\)= \(\frac{x+17}{43}\)- \(\frac{x+15}{45}\)
c) \(\frac{x+6}{1999}\)+ \(\frac{x+8}{1997}\)= \(\frac{x+10}{1995}\)+ \(\frac{x+12}{1993}\)
d) \(\frac{1909-x}{91}\)+ \(\frac{1907-x}{93}\)+ \(\frac{1905-x}{95}\)+ \(\frac{1903-x}{91}\)+ 4 = 0
Giải phương trình sau:
1) \(\frac{x+14}{86}+\frac{x+15}{85}+\frac{x+6}{84}+\frac{x+17}{83}+\frac{x+116}{4}=0\)
2) \(\frac{x-241}{17}+\frac{x-220}{19}+\frac{x-195}{21}+\frac{x-166}{23}=0\)
3) \(\frac{x+2}{13}+\frac{2x-45}{15}=\frac{3x+8}{37}+\frac{4x+69}{9}\)
Giải phương trình sau :
2) \(\frac{x-241}{17}+\frac{x-220}{19}+\frac{x-195}{21}+\frac{x-166}{23}=0\)
3) \(\frac{x+2}{13}+\frac{2x-45}{15}=\frac{3x+8}{37}+\frac{4x+69}{9}\)
Giải các phương trình sau
1) \(\frac{x-85}{15}+\frac{x-74}{13}+\frac{x-67}{11}+\frac{x-64}{9}=10\)
2)\(\frac{x-1}{13}-\frac{2x-13}{15}=\frac{3x-15}{27}-\frac{4x-27}{29}\)
3)\(\frac{1909-x}{91}+\frac{1907-x}{93}+\frac{1905-x}{95}+\frac{1903-x}{91}+4=0\)
4)\(\frac{x-90}{10}+\frac{x-76}{12}+\frac{x-58}{14}+\frac{x-36}{16}+\frac{x-15}{17}=15\)