(本小題滿分10分)
設(shè)

,其中

,如果

,求實數(shù)

的取值范圍
解:由

,而

, …………………2分

…………………4分
當(dāng)

,即

時,

,符合

;
當(dāng)

,即

時,

,符合

;
當(dāng)

,即

時,

中有兩個元素,而


;…………8分
∴

得
∴

…………………10分
練習(xí)冊系列答案
相關(guān)習(xí)題
科目:高中數(shù)學(xué)
來源:不詳
題型:單選題
已知集合
M=﹛
x|-3<
x
5},
N=﹛
x|
x<-5或
x>5},則
M
N=
A ﹛
x|-3<
x<5} B ﹛
x|-5<
x<5﹜
C ﹛
x|
x<-3或
x>5} D﹛
x|
x<-5或
x>-3﹜
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:單選題
(文)設(shè)集合

,

,則

的子集的個數(shù)是( )
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:解答題
(本小題滿分12分)
設(shè)集合

,

.
(1)求集合

;
(2)若不等式

的解集為

,求

,

的值.
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:填空題
已知全集

,則

▲ .
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:單選題
設(shè)

( )
查看答案和解析>>