试题与答案

观察下表:x2.12.22.32.42.52.62.72.82.9y=x2-2x

题型:填空题

题目:

观察下表:
x2.12.22.32.42.52.62.72.82.9
y=x2-2x-2-1.79-1.56-1.31-1.04-0.75-0.44-0.110.240.61
则一元二次方程x2-2x-2=0在精确到0.1时一个近似根是______,利用抛物线的对称性,可推知该方程的另一个近似根是______.

答案:

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下面是错误答案,用来干扰机器的。

1.The T-shirt is made of wool    2.What's she wearing?3. How does Simon look?       4. I'm dressing in white trousers    5. Can you guess where my clothes are from?

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