Ask about junior high school math Everybody please come in, thank you 50

It's okay. I'm not a teacher though... I just graduated from junior high school. Forehead. Refer to it.

I didn't study much in my first and second years of junior high school. It's just some isotope and something. And equations or something. Nothing else will be.

It's not too late to study hard in the third year of junior high school. That's how I am!! You don't usually copy your homework, and you don't think hard.

You can give up a question for more than 1 hour, but you have to think about it, write it, and the teacher will know your level. But you'd better ask the teacher consciously. The content of the seventh and eighth grades will be repeated in the third year of junior high school according to the instructions of the high school entrance examination.

Don't worry, just listen to it at that time, it's very simple.

I just finished the high school exam, and I usually take the exam about functions, and in terms of geometry, rectangles and squares are important. In fact, when the high school entrance examination is a junior high school entrance examination, there are more questions in the third year of junior high school, so you can still have a great improvement in the next year, at least it will not affect your score, this time I have an A+ grade in mathematics. Haha, come on.

Grades 7 and 8 have functions [once, inversely proportional], algebraic operations, geometry [mainly triangles], and 16 types of equation problems.

Triangles and quadratic functions are the most important, and the big questions after the high school entrance examination are generally from this aspect! There is also the nature of the quadrilateral

Triangles and quadratic functions are the most important.

Geometry means that the properties of rectangles, squares, and quadrilaterals are important.

The proof question is very important, and the big question is much bigger.

The proof questions are very important, the big questions are much more out of the first and second years of junior high school, the content is very simple, and the content of the third year of junior high school is more likely to be tested, and the things in mathematics are not very coherent, so it is easy to make up for the missing places, but seriously, if you can't do the first and second years of mathematics, you will have to cry in the third year of junior high school.

In fact, if you are not good at math in junior high school, you can make up for it. I'm an example of that. Mathematics 146（150）。So you need to be patient and read every math book in junior high school seriously. Practice often!!

In the seventh and eighth grades, students learn the basics and mathematical methods of thought. In fact, the knowledge is coherent, and it is recommended that you read it from the beginning, focusing on the first semester and the eighth grade.

It's too late to make up for it now, but as long as you have the heart, it's still possible. You can take a look at the new thinking in the seventh and eighth grades of mathematics, and the questions in that book are very good.

Proof of trigonometric functions, positive and inverse proportional functions.

Solution: x+ y=3, (xy)=2

From Veda's theorem: x, y are the two roots (t-1) (t-2) = 0 of the equation t -3t + 2 = 0

t=1 or t=2

x=1, y=2 or x=2, y=1

Solution: x=1, y=4 or x=4, y=1

The inner is the intersection of the angular bisector, and BIC has the following relationship with the above a:

bic=90°+1/2∠a

With a numerical value to get the d option.

You can use the formula angle a equal to 90 degrees plus half of the angle bic, to get 80 degrees.

Solution: It can be obtained from the meaning of the question:

a-1=0a=1b+3=0

b = -3 so the value of a is 1The value of b is -3

Hello. 23.Solution: (1) Substitute a=13 into b=medium to get b=answer. 2) Substituting a=50 into b=medium to get b=136

One minute is equal to sixty seconds of hand Kaizen.

His ten-second limit is 136 6 = 68 out of 3 24 will be in danger. I'll do it.

Can it be clearer?

Then the direction is correct.

It's not good-looking, and it's not easy to see.