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1, after college, the first part of the high number is the limit;

? The limit is the watershed:

A is the watershed between elementary mathematics and advanced mathematics;

B, it is the watershed between classical mathematics and modern mathematics;

C is a watershed in mathematics at home and abroad, and our ancestors are not backward.

The establishment of a huge theoretical system of contemporary mathematics has always been beyond our power.

Our backwardness and poverty begin with the limit theory.

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2. The first challenge for college students to study advanced mathematics is the limit.

Especially the limit in ε -δ method, our translation

It is "ε-δ language", and people who swallow dates and have indigestion abound.

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3. Here are eight pictures for the landlord:

The first six are the first 10 in the 2 1 method I summarized.

The landlord can refer to the above 52 examples and try to answer first;

1 1 at the back can cope with the postgraduate exam, so it will not be uploaded.

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The seventh and eighth graphs are the two most important limits. Try to understand them.

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Please remember:

Don't think that you will understand after you finish, talk to yourself slowly and carefully.

Think, ask questions and try to answer them yourself.

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Only by recognizing the ultimate tendency can we learn? ε-δ language, there will be understanding.

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Come on!

We never lack talents, but our talents are destroyed by mediocre teachers in universities!

So, we don't have a world-class mathematician!

Qian Xuesen is concerned about the country and the people. Before he died, he was filled with emotion.

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Click to enlarge each picture;

If you have any questions, please ask and answer them.

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