(本題滿分15分)

已知直角梯形如圖所示,線段

上有一點(diǎn),過(guò)點(diǎn)的垂線交,當(dāng)點(diǎn)從點(diǎn)運(yùn)動(dòng)到點(diǎn)時(shí),

,截直角梯形的左邊部分面積為,試寫(xiě)出關(guān)于的函

數(shù),并畫(huà)出函數(shù)圖象.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


解析:

設(shè),則

對(duì)端點(diǎn)0,4是否取到不作嚴(yán)格要求)

當(dāng)時(shí),

當(dāng)時(shí),

 

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