求y=(x^2-3x+2)/(x^2+2x-3)的值域.

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求y=(x^2-3x+2)/(x^2+2x-3)的值域.求y=(x^2-3x+2)/(x^2+2x-3)的值域.求y=(x^2-3x+2)/(x^2+2x-3)的值域.y=(x²－3x＋2)

求y=(x^2-3x+2)/(x^2+2x-3)的值域.
求y=(x^2-3x+2)/(x^2+2x-3)的值域.

求y=(x^2-3x+2)/(x^2+2x-3)的值域.
y=(x²－3x＋2)/(x²＋2x－3)
.=[(x－1)(x－2)]/[(x－1)(x＋3)]
.=(x－2)/(x＋3)
则值域是：{y|y≠1且y≠－1/4}

x^2+2x-3不等于0，可得（x+3）(x-1)不等于0，得x不等于1且x不等于-3

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