求极限 limx→5 x^2-7x+10/x^2-5^2
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求极限 limx→5 x^2-7x+10/x^2-5^2
limx→5 x^2-7x+10/x^2-5^2
limx→5 x^2-7x+10/x^2-5^2
![求极限 limx→5 x^2-7x+10/x^2-5^2](/uploads/image/z/20083668-60-8.jpg?t=%E6%B1%82%E6%9E%81%E9%99%90+limx%E2%86%925+x%5E2-7x%2B10%2Fx%5E2-5%5E2)
原式=lim(x-2)(x-5)/(x+5)(x-5)
=lim(x-2)/(x+5)
=3/10
=lim(x-2)/(x+5)
=3/10
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