1 不解方程2x2+3x-1=0,求作一个一元二次方程(1)使它的两根分别比原方程各根小1(2)使它的一根为原方程两根河的倒数,另一根为原方程两根差的平方2 已知a≠b,且a+3a-7=0.b2+3b-7=0,求1/a+1/b的值3
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![1 不解方程2x2+3x-1=0,求作一个一元二次方程(1)使它的两根分别比原方程各根小1(2)使它的一根为原方程两根河的倒数,另一根为原方程两根差的平方2 已知a≠b,且a+3a-7=0.b2+3b-7=0,求1/a+1/b的值3](/uploads/image/z/1710102-30-2.jpg?t=1+%E4%B8%8D%E8%A7%A3%E6%96%B9%E7%A8%8B2x2%2B3x-1%3D0%2C%E6%B1%82%E4%BD%9C%E4%B8%80%E4%B8%AA%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%EF%BC%881%EF%BC%89%E4%BD%BF%E5%AE%83%E7%9A%84%E4%B8%A4%E6%A0%B9%E5%88%86%E5%88%AB%E6%AF%94%E5%8E%9F%E6%96%B9%E7%A8%8B%E5%90%84%E6%A0%B9%E5%B0%8F1%EF%BC%882%EF%BC%89%E4%BD%BF%E5%AE%83%E7%9A%84%E4%B8%80%E6%A0%B9%E4%B8%BA%E5%8E%9F%E6%96%B9%E7%A8%8B%E4%B8%A4%E6%A0%B9%E6%B2%B3%E7%9A%84%E5%80%92%E6%95%B0%2C%E5%8F%A6%E4%B8%80%E6%A0%B9%E4%B8%BA%E5%8E%9F%E6%96%B9%E7%A8%8B%E4%B8%A4%E6%A0%B9%E5%B7%AE%E7%9A%84%E5%B9%B3%E6%96%B92+%E5%B7%B2%E7%9F%A5a%E2%89%A0b%2C%E4%B8%94a%2B3a-7%3D0.b2%2B3b-7%3D0%2C%E6%B1%821%2Fa%2B1%2Fb%E7%9A%84%E5%80%BC3)
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