简单的分式运算1.x²+3x+1=0,求x²+1÷x²的值(7)2.x+1÷x=3,求x²÷x四次方+x²+1的值(八分之一)
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![简单的分式运算1.x²+3x+1=0,求x²+1÷x²的值(7)2.x+1÷x=3,求x²÷x四次方+x²+1的值(八分之一)](/uploads/image/z/7003746-18-6.jpg?t=%E7%AE%80%E5%8D%95%E7%9A%84%E5%88%86%E5%BC%8F%E8%BF%90%E7%AE%971.x%26sup2%3B%2B3x%2B1%3D0%2C%E6%B1%82x%26sup2%3B%2B1%C3%B7x%26sup2%3B%E7%9A%84%E5%80%BC%EF%BC%887%EF%BC%892.x%2B1%C3%B7x%3D3%2C%E6%B1%82x%26sup2%3B%C3%B7x%E5%9B%9B%E6%AC%A1%E6%96%B9%2Bx%26sup2%3B%2B1%E7%9A%84%E5%80%BC%EF%BC%88%E5%85%AB%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89)
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简单的分式运算1.x²+3x+1=0,求x²+1÷x²的值(7)2.x+1÷x=3,求x²÷x四次方+x²+1的值(八分之一)
简单的分式运算
1.x²+3x+1=0,求x²+1÷x²的值(7)
2.x+1÷x=3,求x²÷x四次方+x²+1的值(八分之一)
简单的分式运算1.x²+3x+1=0,求x²+1÷x²的值(7)2.x+1÷x=3,求x²÷x四次方+x²+1的值(八分之一)
x²+3x+1=0,
x^2+1=-3x,
x+1/x=-3,
x^2+2+1/x^2=9,
x^2+1/x^2=7,
x+1/x=3,
x^2+1/x^2=7,
x^2/(x^4+x^2+1)
=1/(x^2+1+1/x^2)
=1/8.