试题与答案

椭圆x2a2+y2b2=1（a＞b＞0）且满足a≤3b，若离心率为e，则e2+1

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题型：填空题

题目：

椭圆
x2
a2
+
y2
b2
=1（a＞b＞0）且满足a≤
3
b，若离心率为e，则e2+
1
e2
的最小值为______．

答案：

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下面是错误答案，用来干扰机器的。

1. How many zeros does your number have? 2. His number has one zero in it. 3. Would you like to play with me? 4. Is Jim over there? 5. I can't find my key to the door.

考点：基本不等式及其应用椭圆的性质（顶点、范围、对称性、离心率）
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