y=(x^2-1)/(x^2+2x-3)的单调递增区间是
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y=(x^2-1)/(x^2+2x-3)的单调递增区间是y=(x^2-1)/(x^2+2x-3)的单调递增区间是y=(x^2-1)/(x^2+2x-3)的单调递增区间是y=(x^2-1)/(x^2+2
y=(x^2-1)/(x^2+2x-3)的单调递增区间是
y=(x^2-1)/(x^2+2x-3)的单调递增区间是
y=(x^2-1)/(x^2+2x-3)的单调递增区间是
y=(x^2-1)/(x^2+2x-3)
=(x+1)/(x+3)
y=(x^2-1)/(x^2+2x-3)的单调递增区间是（-∞-3）U（-1,1）U（1,+∞）
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