已知函数
.
(1)若
有两个根
、
,且
,求a的值;
(2)若命题“
,
”为假命题,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cae1d8cc07c3678a15562e549d5f7c2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ca8069f479b414966c9ebff6c1430c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a4eecd249473a831d0ee472470240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9565876bc50bceb63e5793c8c67a9032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0e1de615010c1a08e48de9e38622a1.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3d62fbf886953965eabafe792872f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa569d187359ed7ab26f61f338731a3.png)
22-23高一上·福建莆田·阶段练习 查看更多[2]
更新时间:2022-10-20 21:04:55
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【推荐2】命题p:关于x的不等式x2+2ax+4>0对于一切x∈R恒成立,命题q:函数f(x)=(3﹣2a)x是增函数,若p为真,且q为假,求实数a的取值范围.
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【推荐1】写出下列存在量词命题的否定,并判断其否定的真假.
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(1)有些实数的绝对值是正数;
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名校
【推荐2】已知命题
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eb5712582fc3e02f660173897919dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87353bec8bc9975026206dd507eb7df3.png)
(1)求实数m的取值集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206c243a59a62bba73facf9944cac9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
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【推荐1】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2eb4185432994d8037ef5b05a6009a.png)
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恒成立,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2eb4185432994d8037ef5b05a6009a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857e07c5fb7f2410d6d267a00889db10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
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解题方法
【推荐2】已知命题
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从①
为真命题,②
为假命题,③
为真命题,这三个条件中任选一个,补充在上面的问题中,并回答问题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886606543383d11a4db8f21ac1e4e3bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b67cc905e30b2b59ad6031608c6cfdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
从①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e796d1dba0132636cb56a325d57add1d.png)
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【推荐1】已知方程
的解为
、
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(1)求
、
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6536590376ffc4fbbb76e7ad3e5460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a48786b4cb264802f8d7bc8ee88e478.png)
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解题方法
【推荐2】(1)已知
,求x的取值范围.
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的两个实数解,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192c6c837593b6a8a54b71a109efd0db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035734be53bbfa80e340102915c8c4dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
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