Then by learning math well, you mean how to do math problems.

three?o'clock

1 foundation

2 ideas to solve the problem

3 computing power

There is nothing to understand and recite about the basics.

Computational ability is arithmetic and some special algorithms, not practiced in a day or two. It should be noted that if you didn't watch the meeting last night, you should be lazy to calculate the questions, otherwise the result will be a decline in calculation ability, and the examination time is limited, and the questions may not be finished.

The most important thing is problem-solving thinking. Pay attention when you don't know the answer. If you understand the answer, it doesn't mean you really know it. The answers you see are all calculation processes. What is missing in the answer is the problem-solving idea between the question and the answer, which you think hard after playing with the answer.

take for example

The formula for finding the general term an+1= 2 * an 2.

We have learned the arithmetic ratio # an+1-an = Dan+1/an = q #

The indicators are all the same, and we are considering demotion.

Two methods of descending order: 1 root number 2 takes logarithm.

For the root numbers, the results we get will not make their exponents the same (one has the root number and the other does not).

Then use logarithm.

Results lnan+ 1=ln2+2*lnan. Obviously, the two items in the sequence are the same.

Considering the influence of ln2 on the later calculation, the logarithm base is 2.

log2(an+ 1)= 1+2 * log2(an)

Let log2an=bn @ bn be the new series.

(Pay attention to the consistency of n in the new series. For example, the corresponding value of n*an should be (n+ 1)*an+ 1).

bn+ 1 = 1+2bn

Looking back, # # is more like a geometric series in form, because the coefficient of the arithmetic progression term is the same, and the coefficient cannot be changed for the equation. Constant problem must be solved in the form of equal ratio.

bn+ 1+ 1 = 2 *(bn+ 1)

Bn+ 1 is a arithmetic progression with prime number b 1=log2a 1, and the common ratio is 2.

Write the leading formula of bn+ 1 and use @ @ to solve an.

Simply put, the idea of solving problems is to see what relevant knowledge points you think of given conditions and problems, and then what is the difference between the basic knowledge I know and the problems I should deal with.