求极限.
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求极限.求极限. 求极限.(x^2-2x+1)/(x^2-1)=(x-1)^2/[(x+1)(x-1)]=(x-1)/(x+1),代入x=1,得极限是0原式=(4x^2-2x+1)/(3x+
求极限.
求极限.
求极限.
(x^2-2x+1)/(x^2-1)=(x-1)^2/[(x+1)(x-1)]=(x-1)/(x+1),代入x=1,得极限是0
原式=(4x^2-2x+1)/(3x+2)代入x=0得1/2