唔該翻譯幫下我翻LA,

2007-07-14 8:24 pm
Given that x is decreasing at a constant rate of 2 radians per
second.
Find the rate of change in the area of a when x=q. Is the
area increasing or decreasing at the moment. Explain your answer
briefly.



The picture shown that a tetrahedron PQRS where PQ is perpendicular
to the plane QRS. PQ = QR = QS = RS = 1m, PT = TV = VR and
PU = UW = WS.

回答 (2)

2007-07-14 8:31 pm
✔ 最佳答案
1. 資料:

x 以每秒2弧度的恆等速率減少。

當 x = q,求面積 a 的改變速率。面積是在增加或在減少?試簡單地解釋你的答案。


2. 圖片顯示了一個四邊形PQRS,PQ垂直於平面QRS。 PQ = QR = QS = RS = 1米。

試證明:

PQ = TV = VR 和 PU = UW = WS
參考: Myself~~~
2007-07-14 8:29 pm
假使x正在2 radians的固定比率減少每
第二。
發現比率的變化在的區域內一什麼時候x = q。
地區增加或者那時減少。


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