1 . 悬索桥是以通过索塔悬挂并锚固于两岸(或桥两端)的缆索(或钢链)作为上部结构主要承重构件的桥梁.当微积分尚未出现时,伽利略猜测缆索悬链线的形状是抛物线,直到1691年莱布尼兹和伯努利借助微积分推导出缆索悬链线的方程为
,其中c为参数.当
时,该方程就是双曲余弦函数
,类似的有双曲正弦函数
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79bd19cf271c54cef7633a2dcb7ca5b6.png)
_____ ,函数
的最小值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b231c5652e872d8395f708c4923b97cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b0dc2a8d8152e8d619282d858b9f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409c3e6ea035791a471382012e5640a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79bd19cf271c54cef7633a2dcb7ca5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45fe3f7753d9d6354ea8aa7e01dd277.png)
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2 . 函数
的值域为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168121e926cf297013b94511eca17631.png)
您最近一年使用:0次