1) Thuc hien phep tinh cong 2 phan thuc \(\dfrac{2x}{x^2-2x+1}+\dfrac{x+1}{x-1}\) duoc ket qua la:

A. \(\dfrac{x^2+2x+1}{\left(x-1\right)^2}\)             B. \(\dfrac{x^2+2x-1}{\left(x-1\right)^2}\)      C. \(\dfrac{x^2-x-1}{\left(x-1\right)^2}\)           D. \(\dfrac{x^2-2x-1}{\left(x-1\right)^2}\)

Thuc hien phep tinh

thuc hien phep tinh :

\(\frac{1}{x-1}-\frac{x^3-x}{x^2+1}\left(\frac{1}{x^2-2x+1}+\frac{1}{1-x^2}\right)\)

thuc hien phep tinh:

(x+2)(1+x-x^2+x^3-x^4)-(1-x)(1+x+x^2+x^3+x^4)

thuc hien phep tinh:

(x+2)(1+x-x^2+x^3-x^4)-(1-x)(1+x+x^2+x^3+x^4)

thuc hien phep tinh:

(x+2)(1+x-x^2+x^3-x^4)-(1-x)(1+x+x^2+x^3+x^4)

Giup mk not bai nay , dang gap !

Thuc hien phep tinh:

a, (x -2) ^3 -x(x+1)(x-1) + 6x(x -3)

b, (x-2)(x^2 - 2x +4)(x+2)(x^2 +2x + 4)

Thanks moi ng nha !

thuc hien phep tinh:3*x^2*(6*x^(n-3)+1)-2*x^n*(9*x^(n-3)-1)

thuc hien phep tinh :

a, (x+1)(1+x-x^2+x^3-x^4)-(x-1)(1+x+x^2+x^3+x^4)

b, (2b^2-2-5b+6b^3)(3+3b^2-b)