giúp mk chiều nay rùi
a,\(\dfrac{7}{8x^2-18}+\dfrac{1}{2x^2+3x}-\dfrac{1}{4x-6}\)
b,\(\dfrac{3x^2+5x+14}{x^3+1}+\dfrac{x-1}{x^2-x+1}-\dfrac{4}{x+1}\)
c,\(\left(x^2-1\right)-\dfrac{x^4-3x^2-4}{x^2+1}\)
a,\(\frac{1}{2x-2}-\frac{x-1}{3x^2+6x+3}\)
b,\(\frac{4}{x^2-1}+\frac{1}{x+1}+\frac{-2}{x-1}\)
c,\(\frac{5}{2x^2+6x}-\frac{4-3x^2}{x^2-9}-3\)
ai jup em vs
a) \(\dfrac{x^2-x}{x-2}+\dfrac{4-3x}{x-2}\)
b) \(\dfrac{a+2b}{3a-b}+\dfrac{2a-5b}{b-3a}\)
c) \(\dfrac{2}{x^2-9}+\dfrac{1}{x+3}\)
d) \(\dfrac{4x}{x^2-4}+\dfrac{x}{x+2}+\dfrac{2}{x-2}\)
e) \(\dfrac{3x^2-x+3}{x^3-1}+\dfrac{1-x}{x^2+x+1}+\dfrac{2}{1-x}\)
f) \(\dfrac{1}{x^2+3x+2}+\dfrac{1-x}{x^2+x+1}+\dfrac{2}{1-x}\)
g) \(\dfrac{a^3}{\left(a-b\right)\left(a-c\right)}+\dfrac{b^3}{\left(b-a\right)\left(b-c\right)}+\dfrac{c^3}{\left(c-a\right)\left(c-b\right)}\)
h) \(\dfrac{1}{1-x}+\dfrac{1}{1+x}+\dfrac{2}{1+x^2}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}\)
Làm phép cộng
a, \(\dfrac{3x^2y+5}{15x^3y^4}+\dfrac{3x^2y-5}{15x^3y^4}\)
b,\(\dfrac{2x^2-x}{x^2+x+1}+\dfrac{x^3-2x^2+x+1}{x^2+x+1}\)
Các bạn giúp mk nha
Thực hiện phép tính :
a) x+1/x - x2 + x+2/2 - 4x + 2x2
b) x/x3-1 + x+1/x2- x + x-1/x2+x+1.
c) x3-2x2-x+2/x3+x2-4x-4 + x3-5x+4/x3+2x2-3x-4
Cộng các phân thức cùng mẫu thức :
a) \(\dfrac{1-2x}{6x^3y}+\dfrac{3+2y}{6x^3y}+\dfrac{2y-4}{6x^3y}\)
b) \(\dfrac{x^2-2}{x\left(x-1\right)^2}+\dfrac{2-x}{x\left(x-1\right)^2}\)
c) \(\dfrac{3x+1}{x^2-3x+1}+\dfrac{x^6-6x}{x^2-3x+1}\)
d) \(\dfrac{x^2+38x+4}{2x^2+17x+1}+\dfrac{3x^2-4x-2}{2x^2+17x+1}\)
tính:
a, \(\dfrac{1}{1-x}+\dfrac{1}{1+x}+\dfrac{2}{1+x^2}+\dfrac{4}{1+x^2}+\dfrac{4}{1+x^4}+\dfrac{8}{1+x^8}+\dfrac{16}{1+x^{16}}\)
b, 2y - \(\dfrac{6xy+2y}{3x+2y}+\dfrac{2y-9x^2}{3x+2y}\)
thực hiện phân thức x-5/2x-4+3x-3/2x-4
1. thực hiện phép tính sau:
c) 3x + 5 phần x^2 - 5x + 25 - x phần 25 - 5x
d) x^2 + x^4 + 1 phần 1 - x^2 + 1
e) 4x^2 - 3x + 17 phần x^3 - 1 + 2x - 1 phần x^2 + x + 1 + 6 phần 1 - x
