设y=x^2+x+1,则方程x^2+x+1=2/x^2+x可变形为( )A.y^2-y-2=0 B.y^2+y+2=0 C.y^2+y-2=0 D.y^2-y+2=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 02:34:58
![设y=x^2+x+1,则方程x^2+x+1=2/x^2+x可变形为( )A.y^2-y-2=0 B.y^2+y+2=0 C.y^2+y-2=0 D.y^2-y+2=0](/uploads/image/z/4532576-32-6.jpg?t=%E8%AE%BEy%3Dx%5E2%2Bx%2B1%2C%E5%88%99%E6%96%B9%E7%A8%8Bx%5E2%2Bx%2B1%3D2%2Fx%5E2%2Bx%E5%8F%AF%E5%8F%98%E5%BD%A2%E4%B8%BA%EF%BC%88+%EF%BC%89A.y%5E2-y-2%3D0+B.y%5E2%2By%2B2%3D0+C.y%5E2%2By-2%3D0+D.y%5E2-y%2B2%3D0)
x){n_mEvӎϦ|*`kf=_ӽ~O=zqFF
N v6a] j@6IEdLv6{`@F&2օ4)/:m@ i7
设y=x^2+x+1,则方程x^2+x+1=2/x^2+x可变形为( )A.y^2-y-2=0 B.y^2+y+2=0 C.y^2+y-2=0 D.y^2-y+2=0
设y=x^2+x+1,则方程x^2+x+1=2/x^2+x可变形为( )
A.y^2-y-2=0 B.y^2+y+2=0 C.y^2+y-2=0 D.y^2-y+2=0
设y=x^2+x+1,则方程x^2+x+1=2/x^2+x可变形为( )A.y^2-y-2=0 B.y^2+y+2=0 C.y^2+y-2=0 D.y^2-y+2=0
设y=x^2+x+1,则方程x^2+x+1=2/x^2+x
y=2/(y-1)
y^2-y=2
y^2-y-2=0
则应选A