1 . 判断正误(正确的写正确,错误的写错误)
(1)若指数函数
是减函数,则
.( )
(2)对于任意的
,一定有
.( )
(3)
是刻画指数增长变化规律的函数模型.( )
(4)若
,则
.( )
(1)若指数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
(2)对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf7a904df8f22e3f1e26a4116eb7913.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9f7df4f0e8280ec47960ef91f67679.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dcde351221be6b414e28a9e315d937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752455799e49f846e2601304fec5d3b8.png)
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解题方法
2 . 判断正误(正确的打正确,错误的打错误)
(1)
.( )
(2)
. ( )
(3)
. ( )
(4)
. ( )
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2f97bb1824f3a90a0d46fee6c0057b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79427caec22f1a1ba71e630059de015b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd51f8c0e5a417857ff013dcde8ccfa.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e40cbb1d74b4f5b51d9083df8ecf89b.png)
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3 .
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c099c0ae58ac7f970be4e3ee3cb4e7b.png)
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4 . 已知
,
,
,则
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051eb86f1c889ff58a9862a2430ce485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15b871b0fd9a112312d5e81ccf97326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5635268e292b3ad54acbe50abd187530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
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5 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cfecb59c59125afc3f5363579193a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0f34fa25bdc75840c3a33d4a2dd475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
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