If 2 (X-2) 3 = 634, then x equals () A. 12b. 72C. 12 or 72d

If 2 (X-2) 3 = 634, then x equals () A. 12b. 72C. 12 or 72d

∵ 2 (X-2) 3 = 634 ∵ (X-2) 3 = 278, open cube: X-2 = 32, solution: x = 72

Let 84 be written as a prime number, and the form of multiplication is 84 = ()

Let 84 be written in the form of prime multiplication: 84 = (2 × 2 × 3 × 7)

|x-1|+|x-2|+… +|What is the minimum value of x-2005______ ．

Since there are 2005 terms in the absolute value of the original formula, the middle term is | x-1003 |, so just take x = 1003, and the sum of them can get the minimum value. The original formula can be expanded as: | X-1 | + | X-2 | + | x-3 | + +|x-2005|=|1003-1|+|1003-2|+… +|1003-1003|+|1003-1002|+… +|1003-20...

1.2.3.5.8.13. (). (). 56 find the law

21

The problem of the division of Olympian mathematics in grade five of primary school
1. With 1, 2, 3 The nine digits 8 and 9 make up the three non repeating three digit numbers. The second digit is twice the first digit, and the third digit is three times the first digit. In all these three digit numbers, what is the difference between the largest three digit number and the smallest three digit number?
2. A workshop received the processing task, and required to process 88 class a parts, 554 class B parts and 147 class C parts. These tasks were evenly distributed to each worker. The remaining parts of class B are three times of class A and class C are two times of class A. how many workers are there in this workshop?
3. Given that 49 is divisible by 7, can 294 be divisible by 7? Why?
4. At least one of the sum, difference and product of any two natural numbers can be divisible by 3

The first problem satisfies the following groups of integers: 192384576219438657273546819327654981, then the difference between the largest three digits and the smallest three digits is: 981-192 = 789. The second problem satisfies the following groups of integers: 1 and 29

What is static friction and what is dynamic friction?

1. The concept of sliding friction: when two objects contact each other (and squeeze each other), when they do relative motion, there will be a force on the contact surface to hinder the relative motion, which is called sliding friction
(1) The conditions for the generation of sliding friction are as follows: 1) direct contact between two objects; 2) pressure between two objects in contact; 3) relative motion between two objects; 4) unsmooth contact surface;
(2) If there is sliding friction between two objects in contact, there must be relative motion between them;
(3) The action point of sliding friction: on the contact surface of two objects;
(4) The direction of sliding friction is tangent to the contact surface and opposite to the relative motion direction between objects;
(5) Sliding friction force: F = μ FN, μ - sliding friction coefficient (or dynamic friction coefficient), which is determined by the material of the object and the roughness of the contact surface, has no unit; FN - positive pressure, that is, the pressure perpendicular to the contact surface
2. The concept of static friction: when there is a tendency of relative sliding between objects in contact (and squeeze each other), the friction between objects is called static friction
(1) The conditions of static friction are as follows: ① direct contact between two objects; ② pressure between two objects in contact; ③ relative motion trend between two objects; ④ unsmooth contact surface;
(2) The principle of static friction is that if there is static friction between two objects which are in contact with each other, the two objects must be relatively static. However, it should also be noted that static friction can exist between stationary objects or between moving objects, Sometimes it plays a dynamic role (recall or refer to "4. Force analysis of objects" in Chapter 12 "7. Knowledge supplement and expansion")
(3) The action point of static friction: on the surface where two objects contact each other;
(4) The direction of static friction force is tangent to the contact surface and opposite to the direction of relative motion trend of the object;
(5) Static and dynamic friction: the size of static friction should be determined according to the force and motion of the object (in junior high school, the size of static friction can be obtained by force analysis combined with the balance of two forces)

10.9.8.7.6.5

4,3,2,1,0

Given that the product of two continuous positive even numbers equals 168, then the two even numbers are______ ．

Let the smaller even number be 2n, and the larger one be (2n + 2), (2n + 2) · 2n = 168, n = 6 or n = - 7 (rounding off). 2n = 12, 2n + 2 = 14. So the two even numbers are 12, 14. So the answer is: 12, 14

The root sign of 18 - (PAI-1) to the power of 0-1 / the root sign of 2 + 1 + (1 / 4) to the power of - 1

(√18)-(π-1)^0-（1/√2）＋1＋（1/4)^(-1)
=(3√2)-1-(√2/2)+1+4
=(3√2)-(√2/2)+4
=(5/2)*2+4

1,2（x-3）=5.8 2、 13（x+5)=169
solve equations.

Hello: 2 (x-3) = 5.8x-3 = 2.9x = 2.9 + 3x = 5.9 13 (x + 5) = 169x + 5 = 169 △ 13X = 13-5x = 8 if you don't understand this question, please click "praise" if you are satisfied. If you have any other questions, please send and click my avatar for help. The answer is not easy, please understand, thank you