已知为实数,求使成立的x的范围.

已知为实数,求使成立的x的范围.

答案

10m=0时,x>1  ;20m≠0时,

m<0时,  ②0<m<1时,

m=1时, x 不存在    ④m>1时,


解析:

,    ………4分

10m=0时,x>1…………………6分

20m≠0时,

m<0时,…………………8分

②0<m<1时,……………10分

m=1时, x 不存在………………………12分

m>1时,……………………………14分

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