High school math can t be done!High School Math!It s urgent

High school mathematics is different from junior high school mathematics, junior high school mathematics is relatively less easy to master, high school mathematics is flexible, has a wide range of knowledge, and needs a good understanding. Do two more questions of each question type to memorize it effectively. It is also necessary to consolidate it in time, otherwise it will be forgotten, and I believe that as long as you work hard, you will be able to learn math well.

When you first start learning mathematics, it's normal to not know how to do things when you encounter problems, but at this time, you have to be patient to solve them, as long as you pass this period, there will be no big problem with mathematics.

Take your time, do more and become proficient.

Proof: Because AC is perpendicular to AB and AD is perpendicular to BC, the area of the triangle ABC is s=ac·ab 2=ad·bc 2

So ad bc ab ac, the two sides are squared to get ad bc ab

Because AD, BC, AC, and BC are not zero, the two sides are counted backward to 1 (ad bc

1 (ABAC because BC.)

ab+ac, so 1 [ad

abac＝1/(ab

Simplify ac to get 1 ad

abac/(ab

AC is 1 AD = 1 AB + 1 AC.

As for the conjecture in tetrahedron, I don't have any ideas.

After every half-life that has passed, the original 1 2 remains

Nine is 1 2 9 = 1 512 > 1 1000

So it can be measured.

Is this the method of agitation... Use a calculator to do the math. The answer is yes.

How do you learn math in high school?Is math hard to learn in high school?

Mathematics is a subject, both for liberal arts and science students. It is more important because it is one of the three main courses, and it accounts for a relatively large number of points. If you don't do well in mathematics, you may affect the study of physical chemistry, because those subjects are all about calculations.

However, these calculations are also in mathematics. How do you learn math in high school?What are some good ways to do this?

High School Math!Know the reasons why your child is not good at math:

1. Don't let children learn passively, there are still many students who want to be in junior high school after going to high school, so they follow the teacher's train of thought. I don't have some derivatives, I didn't have a learning method before, and I won't look for it after class. If you practice with practice questions, you just wait for class, and you don't know what the teacher is doing in front of you to write about the content of the teacher's class, and just thinking about taking notes in class is not effective.

2. When the teacher is in class, he should express this knowledge clearly and analyze the key points and difficulties. However, there are still many students who do not pay attention in class. I don't know about many pharmacies, but I take a lot of notes, and there are many problems that I can't understand, and I won't summarize them after class.

Just hurry up and do your homework. When they write their homework, they just mess around and remind them that they don't understand the concepts and rules. Doing questions can only be done by chance.

3. Don't pay attention to the foundation, many children don't have a solid foundation, but they think they have learned well and want to move on to the next lesson, and the premise is that you have to understand all the content of the previous lesson. The evolution of the next question is underway. Find the right way to learn.

For how to learn high school mathematics, it is still important to find a suitable way to learn. The first thing we need to do is to cultivate a good study habit, good study habits include making a study plan, before class, study by yourself, listen carefully to the class when you are in class, and actually consolidate the knowledge engraved after class, and do exercises carefully after class.

At this stage of high school, children say that they are neither small nor big, and at this age, children are very impatient no matter what they do. For this situation, you should not worry. We just need to communicate with the child more and find out the reason why the child is not learning well.

The teacher asks the children to work on the blackboard.

Mathematics is responsible for developing children's arithmetic skills and children's ability to apply knowledge. How to learn math in high school? It still depends on the student's understanding of mathematics.

Students should have their own learning methods, and you should not only grasp the content of the teacher's lesson, but also consolidate and deepen it in time after the class.

Maybe, but it mainly depends on hobbies and a little talent, with these items, you can do well, but if you are not good and discouraged, and if you are afraid, then it really has nothing to do with you.

Well, it's hard to say, when I was in high school, I was in my 70s, and at most 139, mainly to keep up with the teacher's lecture ideas, and to ask questions.

Well, no, we're at least 115 or so (160).

Because there are too many Chinese, there are many monks and few porridges, and they must be strictly eliminated.

Because if it is too simple, everyone will get a high score in the exam, and the children of the leaders will not be able to study abroad.

In fact, as long as you sort out your thinking, it is not difficult.

If you find it difficult, it will be difficult for others. In fact, as long as you understand it, it is not difficult.

Because of high school math.

Unlike the mathematics I learned before, elementary and junior high school mathematics only has a few pieces of knowledge, and sometimes it is enough to do more problems. But high school math is different, not only if you are willing to take the time, because many topics are about skills and flexibility, many clever methods to master, and you need to be able to draw inferences, of course, it is difficult. And the knowledge points are many and miscellaneous.

But I don't know what grade you are, you can take a look at the college entrance examination papers, and the types of questions examined are only a few pieces, unlike the usual ones that cover the knowledge points weirdly and deeply. Trigonometric function, the formula is the most important, the formula is not familiar with the memory, everything is in vain, the probability will not be too difficult, the big deal is a number, the emphasis is on careful, do not miss the number, the number series, it is important to pay attention to the method, including the pending coefficient, accumulation, multiplication, dislocation subtraction and other methods, you can find relevant topics to practice. Spatial geometry, to calculate, it is recommended that you use the vector method to do it, save some time, of course, the proof is more or the analytical method is faster.

The difficult thing is the derivative and conic curve, for such a question, don't spend more time, generally master the basic knowledge, the first question will still be answered, you must get, just work hard to get the points you can get, and the results will never be too bad.

As long as you are good at going your own way, generalizing, and summarizing from time to time will be the best

This one asks me best. Who made you sleep in the first year of high school? And then it was a year of play.

Math. It's one ring after another. It's been a year.

Isn't it difficult? Of course, you can choose to go on from the upper freshman. You can definitely learn it well.

How is it not absolutely difficult to physically be?

That's because you're playing on your phone in class, and it's math class, hey.

Choose 6

is c(49,6)=49!/(43!*6!If there is no 15

then choose 6 out of the other 48

is c(48,6)=48!/(42!*6!So there is no probability of 15 = [48!]./(42!*6!)]/[49!/(43!*6!)]

So the probability of having 15 is 1-43 49=6 492, and it is assumed that there is no 15 6 times

No 15 probability is 48 49

So 6 times it was not (48 49) 6

So there is a 15 probability that it is 1-(48 49) 6

Actually, the function y=x +1>=1>0, that is, its function value is a positive number;

And the function y=x is an increasing function;

So, a positive number multiplied by an increasing function, that function is still incremental, in addition, you can use the derivative method of f(x)=x +x to get f'(x)=3x +1>0, so this function is an increment function.

You can't think of it that way.

For example: f(x)=x increase.

f(x)=2x increase.

f（x）=2xx （。

That's not true!

As x increases, so does f(x).

Although there are two intervals of f(x)=x +1, x is also increasing, so f(x)=x +1 is still increasing!!

Your method doesn't work, either use the definition or the derivative, and generally just use the definition.

Proven with derivatives.

f（x）=x（x²+1）

f’(x）=1×（x²+1）＋x(2x)=3x²+1＞0∵f’(x）＞0

f(x) increases monotonically in the range of real numbers.

It can also be done by definition.

f(x)=x(x^2+1)=x^3+x

Take any x1, x2 r, and x1 x2

f(x1)-f(x2)=x1 3-x2 3+x1-x2 y=x 3 is an increment function on r.

x1^3-x2^3＜0

x1＜x2x1-x1＜0

f(x1)-f(x2)＜0

i.e. f(x1) f(x2).

f(x) is an increment function on r.

That's how it should be proven.

For your formula, the derivative is x2 1, because x2 is greater than 0, so x2 1 is greater than or equal to 1 so it is the number of extensions.

sn=kan+1

s(n-1)=ka(n-1)+1

an=sn-s(n-1)=kan-ka(n-1)k-1)an=ka(n-1)

an/a(n-1)=k/(k-1)

Therefore, it is equal to the number of pidans in the spring of the next year.

7 solution: the original equation is the same place cos, then:

sinα/cosα -2) / (3+5sinα/cosα) =-5

tanα -2=-5(3+5tanα)

tanα = -23/16

8 solutions: 1 radan 57°

Therefore: sin1 > cos1

again tan1 = sin1 cos1 and cos1 < 1 thus: tan1 > sin1

i.e.: tan1 > sin1 > cos1

Choose C9 solution: cos2x=2cos x-1

Therefore: f(cosx)=2cos x-1

i.e.: f(x)=2x -1

f(sin15°)=2sin²15°-1

2sin²15°-sin²15°-cos²15°=sin²15°-cos²15°

cos30°

3 2 choose A

The numerator and denominator are both divided by COSA

sina/cosa-2cosa/cosa)/(3sina/cosa+5cosa/cosa)=-5

tana-2)/(3tana+5)=-5tana-2=-5(3tana+5)

tana-2=-15tana-25

16tana=-23

tana=-23/16

So tan1>sin1>cos1

2cos²x-1

f(x)=2x²-1

f(sin15°)=2sin²15°-1

(1-2sin²15°)

cos30°

7. Equation c of the numerator and denominator divided by cos and tan; 8 questions use function images to compare sizes, 1 is the meaning of 1 radian c; Problem 9 can be replaced by z=cosx, substituted into the function, and then replaced with sin15.