如图,直线与双曲线相交于,两点,轴,轴,则面积的最小值为 . 答案:6. 【解答】解:设,,则. 将代入,得, 整理,得, 则,, ., 当时,的面积有最小值6.
听录音,选答语。
( ) 1. A. It's black. ( ) 2. A. You're welcome.( ) 3. A. I have a pen. ( ) 4. A. It's 8 pen. ( ) 5. A. All right!
B. It's big. B. Here you are B. I have 23. B. It's red. B. Good job!