lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2 lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2解释下为什么同除以x^2,还有第二步=lim x→∞ (1/x²-1)/(2-3/x^2) 怎么算出来等于-1/
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![lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2 lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2解释下为什么同除以x^2,还有第二步=lim x→∞ (1/x²-1)/(2-3/x^2) 怎么算出来等于-1/](/uploads/image/z/9316650-66-0.jpg?t=lim+x%E2%86%92%E2%88%9E+%281-x%5E2%29%2F%282x%5E2-3%29+%3Dlim+x%E2%86%92%E2%88%9E+%281%2Fx%26%23178%3B-1%29%2F%282-3%2Fx%5E2%29+%3D-1%2F2+lim+x%E2%86%92%E2%88%9E+%281-x%5E2%29%2F%282x%5E2-3%29+%3Dlim+x%E2%86%92%E2%88%9E+%281%2Fx%26%23178%3B-1%29%2F%282-3%2Fx%5E2%29+%3D-1%2F2%E8%A7%A3%E9%87%8A%E4%B8%8B%E4%B8%BA%E4%BB%80%E4%B9%88%E5%90%8C%E9%99%A4%E4%BB%A5x%5E2%2C%E8%BF%98%E6%9C%89%E7%AC%AC%E4%BA%8C%E6%AD%A5%3Dlim+x%E2%86%92%E2%88%9E+%281%2Fx%26%23178%3B-1%29%2F%282-3%2Fx%5E2%29+%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA%E6%9D%A5%E7%AD%89%E4%BA%8E-1%2F)
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lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2 lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2解释下为什么同除以x^2,还有第二步=lim x→∞ (1/x²-1)/(2-3/x^2) 怎么算出来等于-1/
lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2
lim x→∞ (1-x^2)/(2x^2-3)
=lim x→∞ (1/x²-1)/(2-3/x^2)
=-1/2
解释下为什么同除以x^2,
还有第二步
=lim x→∞ (1/x²-1)/(2-3/x^2)
怎么算出来等于-1/2的
我想起来怎么算了,我好关闭问题
lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2 lim x→∞ (1-x^2)/(2x^2-3) =lim x→∞ (1/x²-1)/(2-3/x^2) =-1/2解释下为什么同除以x^2,还有第二步=lim x→∞ (1/x²-1)/(2-3/x^2) 怎么算出来等于-1/
- - 楼主很给力.
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