\(\dfrac{5xy-4y}{2x^2y^3}+\dfrac{3xy+4y}{2x^2y^3}=\dfrac{5xy-4y+3xy+4y}{2x^2y^3}=\dfrac{8xy}{2x^2y^3}=\dfrac{4}{xy^2}\)
\(\dfrac{5xy-4y}{2x^2y^3}+\dfrac{3xy+4y}{2x^2y^3}=\dfrac{5xy-4y+3xy+4y}{2x^2y^3}=\dfrac{8xy}{2x^2y^3}=\dfrac{4}{xy^2}\)
Thực hiện các phép tính sau :
a) \(\dfrac{3x-5}{7}+\dfrac{4x+5}{7}\)
b) \(\dfrac{5xy-4y}{2x^2y^3}+\dfrac{3xy+4y}{2x^2y^3}\)
c) \(\dfrac{x+1}{x-5}+\dfrac{x-18}{x-5}+\dfrac{x+2}{x-5}\)
Thực hiện phép tính :
a) \(\dfrac{1}{x-2y}+\dfrac{8y^2}{4y^2x-x^3}+\dfrac{1}{x+2y}\)
1) thực hiện các phép tính sau
a) 3x - 5/ 7+ 4x+ 5/7
b) 5xy - 4x/2x^2y^3 + 3xy+ 4y/2x^2y^3
c) x+1/X-5+x-18/x-5+x+2/x-5
2)
a) 2/x+3 + 1/x
b) x+1/2x-2+(-2x)/x^2-1
c) y - 12/6y- 36+ 6/ y^2- 6y
d) 6y/x+3x+3/2x+6
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, \(\dfrac{2x+y}{2x^2+xy}\)+\(\dfrac{16x}{y^2-4y^2}\)+\(\dfrac{2x-y}{2x^2+xy}\)
d, \(\dfrac{1}{1-x}\)+\(\dfrac{1}{1+x}\)+\(\dfrac{2}{1+x^2}\)+\(\dfrac{4}{1+x^4}\)+\(\dfrac{8}{1+x^8}\)+\(\dfrac{16}{1+x^{16}}\)
Cộng các phân thức khác mẫu thức :
a) \(\dfrac{5}{6x^2y}+\dfrac{7}{12xy^2}+\dfrac{11}{18xy}\)
b) \(\dfrac{4x+2}{15x^3y}+\dfrac{5y-3}{9x^2y}+\dfrac{x+1}{5xy^3}\)
c) \(\dfrac{3}{2x}+\dfrac{3x-3}{2x-1}+\dfrac{2x^2+1}{4x^2-2x}\)
d) \(\dfrac{x^3+2x}{x^3+1}+\dfrac{2x}{x^2-x+1}+\dfrac{1}{x+1}\)
Cộng các phân thức:\(\dfrac{2x}{x^2+2xy}+\dfrac{y}{xy-2y^2}+\dfrac{4}{x^2-4y^2}\)
làm phép tính
\(\dfrac{x}{x^2+2xy}+\dfrac{1}{x-2y}+\dfrac{4y}{4y^2-x^2}\)
\(\dfrac{2x}{x-1}+\dfrac{5x^2-5}{x^2+2x+1}.\dfrac{2x+2}{5-5x}\)
\(\left(\dfrac{2x}{2x-1}+\dfrac{3x}{2x+1}\right).\dfrac{4x^2-4x+1}{8x^2+10x}\)
\(\dfrac{5x-5}{2x}.\left(\dfrac{x+1}{x-1}-\dfrac{x-1}{x+1}\right)\)
GIÚP MÌNH VỚI CÁC BẠN
1, Thực hiện phép tính:
a, \(\dfrac{1-3x}{2}+\dfrac{x+3}{2}\)
b, \(\dfrac{2\left(x+y\right)\left(x-y\right)}{x}-\dfrac{-2y^2}{x}\)
c, \(\dfrac{3x+1}{x+y}-\dfrac{2x-3}{x+y}\)
d, \(\dfrac{xy}{2x-y}-\dfrac{x^2-1}{y-2x}\)
e, \(\dfrac{4x-1}{3x^2y}-\dfrac{7x-1}{3x^2y}\)
2, Thực hiện phép tính:
a, \(\dfrac{1}{x}.\dfrac{6x}{y}\)
b, \(\dfrac{2x^2}{y}.3xy^2\)
c, \(\dfrac{15x}{7y^3}.\dfrac{2y^2}{x^2}\)
d, \(\dfrac{2x^2}{x-y}.\dfrac{y}{5x^3}\)
e, \(\dfrac{5x+10}{4x-8}.\dfrac{4-2x}{x+2}\)
f, \(\dfrac{x^2-36}{2x+10}.\dfrac{3}{6-x}\)
Dùng quy tắc đổi dấu để tìm mẫu thức chung rồi thực hiện phép cộng :
a) \(\dfrac{4}{x+2}+\dfrac{2}{x-2}+\dfrac{5x-6}{4-x^2}\)
b) \(\dfrac{1-3x}{2x}+\dfrac{3x-2}{2x-1}+\dfrac{3x-2}{2x-4x^2}\)
c) \(\dfrac{1}{x^2+6x+9}+\dfrac{1}{6x-x^2-9}+\dfrac{x}{x^2-9}\)
d) \(\dfrac{x^2+2}{x^3-1}+\dfrac{2}{x^2+x+1}+\dfrac{1}{1-x}\)
e) \(\dfrac{x}{x-2y}+\dfrac{x}{x+2y}+\dfrac{4xy}{4y^2-x^2}\)
Làm tính cộng các phân thức sau :
a) \(\dfrac{5}{2x^2y}+\dfrac{3}{5xy^2}+\dfrac{x}{y^3}\)
b) \(\dfrac{x+1}{2x+6}+\dfrac{2x+3}{x\left(x+3\right)}\)
c) \(\dfrac{3x+5}{x^2-5x}+\dfrac{25-x}{25-5x}\)
d) \(x^2+\dfrac{x^4+1}{1-x^2}+1\)
e) \(\dfrac{4x^2-3x+17}{x^3-1}+\dfrac{2x-1}{x^2+x+1}+\dfrac{6}{1-x}\)