I. Inequality

1. If x≠y, x2+| y | _ _ _ _ _ _ _ 0；;

2. If, the value range of x is ().

x > 1； (B)x≤ 1； (C)x≥ 1； (D)x< 1。

3. The three sides of the triangle are 3 1-2m, 8, so the value range of m is _ _ _ _ _.

4. If the inequality group has no solution, the value range of m is _ _ _ _ _ _.

5. The following statement ① is a solution to inequality; (2) when,; ③ Inequality is established; ④ Inequality is the same as the solution set, and the correct number is ().

a . 4 b . 3 c . 2d . 1

What is the value of 1.k, and b in equation |-24+3a|+ is negative?

2. If the sum of the solutions of the equation is not greater than 1, the range of values is obtained.

Xiao Li and Xiao Zhang decided to save their pocket money. Xiao Li saved 168 yuan and Xiao Zhang 85 yuan saved 16 yuan this month. From next month, Xiao Li will deposit 16 yuan and Xiao Zhang will deposit in 25 yuan every month. How many months will Xiao Zhang save more than Xiao Li? Try to list the inequalities according to the meaning of the questions, and refer to the exploration of 1 in the textbook to find out the solutions of the listed inequalities.

4. Company A has 12 agricultural vehicles and 6 agricultural vehicles in warehouse A and warehouse B respectively, and now it needs to transfer 10 agricultural vehicles to county A and 8 agricultural vehicles to county B. It is known that the freight charges for transporting one agricultural vehicle from warehouse A to county A and county B are 40 yuan and 80 yuan respectively, and the freight charges for transporting one agricultural vehicle from warehouse B to county A and county B are 30 yuan and 50 yuan respectively, (/? (2) Please try to find out that the total freight does not exceed 900 yuan. How many transportation schemes are there? Can you work out the lowest total freight plan?

During the National Day, two parents plan to take some children to travel. They contacted two travel agencies and quoted 500 yuan per person. After negotiation, the preferential conditions of travel agency A are: full charge for both parents and 30% discount for children; B the conditions of travel agency are: 20% discount for parents and children. Suppose two parents take X children to travel, which travel agency should they choose?

Second, decomposition factors.

1. In polynomials, you can use the square difference formula to decompose factors.

There are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

2. Decomposition factor:.

3. So = _ _ = _ _

4. The common factor of polynomial is ()

A, B, C, D,

5. The calculated value is ()

a、 1/2 B、 1/20 C、 1/ 10 D、 1 1/20

6. if x and y are opposite numbers, find the values of x and y.

7. Known, evaluated.

8. Given the values of,,.

9. Calculate in a simple way:.

10. Decomposition factor:.

Third, the score.

1. If non-zero real numbers A and B satisfy 4a2+b2=4ab, then = _ _ _ _.

2. The following equation is incorrect ()

a 、=x-y B、。

C, D,

3. It is known that A and B are real numbers, and ab= 1. Let M= and N=, then the relationship between m and n is () a, M >；; Uncertainty of N B, M=N C and m <

4. If the fractional equation has no solution, the value of is ().

a 、- 1B 、- 3C、0D 、-2

5. The value of: is known.

6. If the fractional equation about has an increasing root, find the value of.

7. If the solution of the fractional equation is a positive number, the value range of.

8. Solve the equation about: (1); (2) .

9. Given, find the values of (1) and (2).

10.A, B and C are in descending order 1. It is known that the sum of the reciprocal of B and A is equal to the reciprocal of C. Find these three numbers.