1, Thực hiện phép tính :
a, dfrac{2x+4}{10} + dfrac{2-x}{15}
b, dfrac{3x}{10} + dfrac{2x-1}{15} + dfrac{2-x}{20}
c, dfrac{x+1}{2x-2} + dfrac{x^2+3}{2-2x^2}
d, dfrac{1-2x}{2x} + dfrac{2x}{2x-1} + dfrac{1}{2x-4x^2}
e, dfrac{x}{xy-y^2} + dfrac{2x-y}{xy-x^2}
f, dfrac{x^2}{x^2-4x} + dfrac{6}{6-3x} +dfrac{1}{x+2}
g, dfrac{2x^2-10xy}{2xy} + dfrac{5y-x}{y} + dfrac{x+2y}{x}
h, dfrac{2}{x+y} +dfrac{1}{x-y} + dfrac{-3x}{x^2-y^2}
i, x+y+ dfrac{x^2+y^2}{x+y}
2, Thực hiện phép tính :
a, dfrac{2x}{...
Đọc tiếp
1, Thực hiện phép tính :
a, \(\dfrac{2x+4}{10}\) + \(\dfrac{2-x}{15}\)
b, \(\dfrac{3x}{10}\) + \(\dfrac{2x-1}{15}\) + \(\dfrac{2-x}{20}\)
c, \(\dfrac{x+1}{2x-2}\) + \(\dfrac{x^2+3}{2-2x^2}\)
d, \(\dfrac{1-2x}{2x}\) + \(\dfrac{2x}{2x-1}\) + \(\dfrac{1}{2x-4x^2}\)
e, \(\dfrac{x}{xy-y^2}\) + \(\dfrac{2x-y}{xy-x^2}\)
f, \(\dfrac{x^2}{x^2-4x}\) + \(\dfrac{6}{6-3x}\) +\(\dfrac{1}{x+2}\)
g, \(\dfrac{2x^2-10xy}{2xy}\) + \(\dfrac{5y-x}{y}\) + \(\dfrac{x+2y}{x}\)
h, \(\dfrac{2}{x+y}\) +\(\dfrac{1}{x-y}\) + \(\dfrac{-3x}{x^2-y^2}\)
i, x+y+ \(\dfrac{x^2+y^2}{x+y}\)
2, Thực hiện phép tính :
a, \(\dfrac{2x}{x^2+2xy}\) + \(\dfrac{y}{xy-2y^2}\)+ \(\dfrac{4}{x^2-4y^2}\)
b, \(\dfrac{1}{x-y}\) + \(\dfrac{3xy}{y^3-x^3}\) + \(\dfrac{x-y}{x^2+xy+y^2}\)
c, \(\dfrac{2x+y}{2x^2-xy}\) + \(\dfrac{16x}{y^2-4x^2}\) + \(\dfrac{2x-y}{2x^2+xy}\)
d, \(\dfrac{1}{1-x}\) +\(\dfrac{1}{1+x}\) + \(\dfrac{2}{1+x^2}\) + \(\dfrac{4}{1+x^4}\) + \(\dfrac{8}{1+x^8}\)+ \(\dfrac{16}{1+x^{16}}\)
