Question

x减二分之一加x加一分之二减x减一分之二减x加二分之一等于？

Answer 1

（1）+（x减一）分之二可化简为（x+1）/（x-1），根号（1）-（x加一）分之二可化简为（x-1）/（x+1），令y=√（x+1）/（x-1）（y>0），则方程可以化为y-1/y=3/2，解得y=2，所以由√（x+1）/（x-1）=2得x=5/3，所以x的值为5/3，希望你满意，可以帮得到你！

Answer 2

1/(x-2) + 2/(x+1) - 2/(x-1) - 1/(x+2)
= [1/(x-2) - 1/(x+2)] + [2/(x+1) - 2/(x-1)]
= 4/(x^2-4) - 4/(x^2-1)
= 4[1/(x^2-4) - 1/(x^2-1)]
= 4*3/[(x^2-4)(x^2-1)]
= 12/[(x^2-4)(x^2-1)]

Answer 3

X - 1/2 + X + 2/1 - X - 2/1 - X + 1/2
= X + X - X - X - 1/2 + 1/2 + 2/1 - 2/1
= 0