limx→∞4x^2+4x-3/3x^2-2x+1
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limx→∞4x^2+4x-3/3x^2-2x+1limx→∞4x^2+4x-3/3x^2-2x+1limx→∞4x^2+4x-3/3x^2-2x+1答:lim(x→∞)(4x^2+4x-3)/(3x
limx→∞4x^2+4x-3/3x^2-2x+1
limx→∞4x^2+4x-3/3x^2-2x+1
limx→∞4x^2+4x-3/3x^2-2x+1
答:
lim(x→∞) (4x^2+4x-3) / (3x^2-2x+1) 分子分母同时除以x^2
=lim(x→∞) (4+4/x-3/x^2) / (3-2/x+1/x^2)
=(4+0-0)/(3-0+0)
=4/3
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