Panda农场有一个四边形农场ABCD,且AD∥BC,其中AD,CD分别靠现有墙DM,DN,其余用新墙(BC、AB、DE)砌成,墙DM长为9米,墙DN足够长,两面墙形成的角度为135°,新墙DE将农场隔成△CDE和矩形ABED两部分.已知新建墙体总长为30米.设AB=x米,农场ABCD的面积为S米2
(1)求S关于x的函数表达式;
(2)当x为何值时,农场ABCD的面积最大,并求出最大面积.
(1)求S关于x的函数表达式;
(2)当x为何值时,农场ABCD的面积最大,并求出最大面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/fc3a3611-bb25-49be-8b46-f88faad98439.png?resizew=200)
更新时间:2021-12-07 09:35:19
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