(x+1)(x-1)(x^2+1) 快

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(x+1)(x-1)(x^2+1) 快
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(x+1)(x-1)(x^2+1) 快
(x+1)(x-1)(x^2+1) 快

(x+1)(x-1)(x^2+1) 快
(x+1)(x-1)(x^2+1)
=(x²-1)(x²+1)
=x^4-1

当X=?时,分式X+1/3X-4的值为1.
依题意得:X+1/3X-4=1
原方程化为:
3x+x-12=3
解得x=15\4
1
x=15/4
2
=(a-1)/(a-b)
3
x=-9/2
4
=12/[(x~2-4)(x~2-1)]