It is very important to master the methods of elementary mathematics in senior high school for the study of advanced mathematics.

Infinite series generally only needs to master the basic knowledge of high school series, but if you want to go deeper, for example, many problems in the series part of postgraduate entrance examination mathematics and competition mathematics depend on the thinking method of high school mathematics series part.

But even if high school mathematics is not very good, it will not have much impact on learning advanced mathematics, just spend a little more time and energy.

The requirements of advanced mathematics teaching in universities are very low. The synthesis of derivatives, series and functions in high school mathematics is generally not involved in college mathematics, but the basic thinking methods in high school are very important in postgraduate mathematics and competition mathematics.

To put it simply, high school mathematics needs you to keep doing problems and make in-depth research, while advanced mathematics only needs to learn things from textbooks, which is actually very shallow.

If you have high demands on yourself, want to take the postgraduate entrance examination and take part in the advanced mathematics competition, the thinking method of high school mathematics is very important.