问题
选择题
已知实数x满足x2+
|
答案
∵x2+
+x+1 x2
=01 x
∴(x+
)2-2+x+1 x
=01 x
∴[(x+
)+2][(x+1 x
)-1]=01 x
∴x+
=1或-2.1 x
∵x+
=1无解,1 x
∴x+
=-2.1 x
故选D.
已知实数x满足x2+
|
∵x2+
+x+1 x2
=01 x
∴(x+
)2-2+x+1 x
=01 x
∴[(x+
)+2][(x+1 x
)-1]=01 x
∴x+
=1或-2.1 x
∵x+
=1无解,1 x
∴x+
=-2.1 x
故选D.