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无穷小和无穷大
2022-04-21 13:53:00 【不玩nano】
无穷小定义
向0逼近的叫无穷小
无穷小加/减/乘无穷小都还是无穷小。而无穷小÷无穷小有多种情况
定理1
无穷小×有界呈无穷小(重要,考试中经常遇到,一般都是三角函数)
例题
定理2
一般用不到,一般理解就行

无穷大定义
向正无穷和负无穷逼近的叫无穷大
1.无穷大×无穷大是无穷大 2.无穷大+有界是无穷大 3.正无穷+负无穷可能是常数,负无穷或正无穷 4.正无穷÷正无穷/负无穷÷负无穷不确定
定理3

版权声明
本文为[不玩nano]所创,转载请带上原文链接,感谢
https://blog.csdn.net/m0_57832432/article/details/123588613
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