Please help me solve advanced math problems, help me solve advanced math problems

In 2007, the National Unified Examination for Enrollment of Ordinary Colleges and Universities in Anhui Science and Mathematics Questions.

.Notes to candidates: Before answering the 2007 Anhui Science College Entrance Examination paper, be sure to fill in your seat number, name, math questions and carefully check the bar code pasted on the answer sheet in the "seat number, name, subject" and my seat number, name,

In 1959, the National Unified Examination for Admission to Ordinary Colleges and Universities was held for mathematics problems. doc...6) There are three parallel lines a, b, and c. that are not in the same plane

**A takes a fixed line segment AB, **C and B each take a point C and DVerification: No matter where c and d are taken in c and b, the volume of tetrahedral abcd is always constant.

II, III ...Grade 9 math problem doc, be sure to fill in your seat number, name, and math problem in the place specified in the test paper and answer sheet. 6) There are three parallel lines a, b, and c. that are not in the same plane

**A takes a fixed line segment AB, **C and B each take a point C and DVerification: No matter where c and d are taken in c and b, the volume of tetrahedral abcd is always constant.

II, III ...

In 2007, the National Unified Examination for Enrollment of Ordinary Colleges and Universities in Anhui Liberal Arts and Mathematics Questions.

.3.When answering the first paper, you must fill in your seat number and name in the place specified in the test paper and answer sheet, and you must write it on the answer sheet with a millimeter black ink pen.

Answers on the question paper are invalid. 4.At the end of the test, the invigilator will take back the test paper and answer sheet.

The graph of the function y=f(x) is a number of points on two lines y=x and y=-x.

1. Take p=, m=, f(p)=, f(m)=, error.

2. Take p=, m=, f(p)=, f(m)=, error.

3. Take p=, m=, f(p)=, f(m)=, f(p) f(m))=, error.

4. Take p=, m=, f(p)=, f(m)=, f(p) f(m))=r, error.

Answer D: 0 correct judgments.

1 is false, if p ), m(-1, -2, -3).

2 false, if p ), m).

3 false, if p ), m ), r).

4 is false, if p ), m(-3, -4), r).

So the answer is D.

Summary. "Limit" is a fundamental concept of calculus, a branch of mathematics, and "limit" in a broad sense means "infinitely close and never reachable". "Limit" in mathematics refers to:

In the process of a certain variable in a function, which gradually approaches a certain definite value a and "can never coincide to a" ("can never be equal to a, but taking equal to a' is enough to obtain high-precision calculation results"), the change of this variable is artificially defined as "always approaching without stopping", and it has a "tendency to constantly get extremely close to point a". Limit is a description of a "state of change". The value a that this variable is always approaching is called the "limit value" (which can also be represented by other symbols).

Students, you can take a picture of the question directly to the teacher.

First of all, the true/false question type is an extreme question. Secondly, stereotyped. Then, with a value. Finally, the answer can be obtained according to the four algorithms.

"Limit" is a fundamental concept of calculus, a branch of mathematics, and "limit" in a broad sense means "infinitely close and never reachable". The "limit" in mathematics refers to a certain variable in a function, which gradually approaches a certain definite value a in the process of eternal change of cavity impulse (or decreases) and "can never coincide to a" ("can never be equal to a, but taking equal to a" is enough to obtain high-precision calculation results), and the change of this variable is artificially defined as "always approaching without stopping", and it has a "tendency to constantly get extremely close to point a".

Limit is a description of a "state of change". The value a that this variable is always approaching is called the "limit value" of the trapped round silver (of course, it can also be represented by other symbols Wang Yan).

Will the teacher do this?

This is a computer, comrade.

If you consult + base conversion, you will have the answer to help you. <>

Teacher, you can't read your words.

Question 3 What-6

e^-6

All right. You can verify that the derivative of the original function is equal to the integrand.

The first two are right, and the last one doesn't know what you're writing about. I don't think the formula is fully written. The integral of the derivative is itself plus the constant c.

x 2+1 obviously takes the minimum value at x = 0, so the problem is that the minimum value is 0 and the maximum value is ln2

Choose C. Indiscriminately use the volume calculation type of parallel cross-section to make jujube formulas.

If you don't know how to do it, you will go to the karmic help

Since it is a regular triangular prism, then the side figure is a rectangle composed of three squares, since aa1=2, and the side length of the regular triangle is 2, then the length of this rectangle is 3*2=6, and the width is 2, then the diagonal length = root number (2 square + (2*3) square) = 2 * (root number 10).

2) To make the length of BMC1 the shortest, it can be seen from the diagram of the first question that when BC1 is the diagonal of the rectangle BB1C1C, the value is the smallest, then BMC1 = root number (2 square + (2 + 2) square) = 2 * (root number 5);

Because in the triangle C1A1M and the triangle Bam, ab=a1c1, the angle bam=angle C1A1m, and the angle A1M1=the angle Amb, it can be seen from the congruence theorem of the triangle that the congruence of these two triangles, by the inference of the congruence of the triangle, we can know that a1m=am, then a1m am=1;

3) From the second question, we can see that M is the midpoint of AA1, and at the same time, we can know BM=C1M, connect the two points of B and C1, and we can know that the triangle BMC1 is an isosceles triangle, because it is a regular triangular prism, point C is the projection point of point C1 on the plane ABC, and point B is the projection point of the point M on the plane ABC, and the cosine value of the angle between the plane ABC and the plane BMC1 is the ratio of the area of the triangle ABC to the triangle BMC1, and let this angle be the angle D. Because the triangle ABC is a regular triangle with a side length of 2, then its height is root number 3, so its area is (2 * root number 3) 2 = root number 3, in the triangle BC1m, C1M1 = root number (square of AB + square of AM) = root number 5, BC1 = root number (square of BC + square of CC1) = 2 times root number 2, through the perpendicular line of BC1 on the left side of m, the intersection point is P, then BP=C1P = root number 2, then high MP= root number (square of BM - square of BP) = root number 3, Then the area of the triangle BMC1 is BC1*MP 2 = root number 6, then cos d = (root number 3) (root number 6) = half root number 2, from the figure it can be seen that this angle is an acute angle, so d = 45 degrees.

Hope it helps.

(1) One side is a square with a side length of 2, and the figure is a rectangle composed of 3 squares, and the length of the diagonal = (2*2+6*6).

2) The length of BMC1 = (2*2+4*4).

a1m/am=1

3) The plane is parallel to the plane ABC, the intersection point of the plane and BB1 is marked as P, and the intersection point with CC1 is marked as Q, then the intersection line of the plane and BMC1 is the perpendicular line of the bottom edge of the triangle MPQ PQ, the intersection point of the perpendicular line and PQ is denoted as N, QNC1 is a plane angle of the dihedral angle, it will be found...