In the process of reading famous works, I understand many principles of life and the true meaning of life One more Is it wrong to deny our opinion? The second Sunday in May is mother's day. The head teacher said that many children send their mother flowers, but the class is quiet for one minute. Why

In the process of reading famous works, I understand many principles of life and the true meaning of life One more Is it wrong to deny our opinion? The second Sunday in May is mother's day. The head teacher said that many children send their mother flowers, but the class is quiet for one minute. Why

Get rid of
Remove denial or denial

In the process of reading literary masterpieces, I have learned a lot about how to be a man
In the process of reading literary classics, I understand a lot of principles of life
2. In the face of such a good situation
Can I not be indifferent to the scenery?

Take out the first sentence take out the second sentence do not take out

Through this activity, I understand the truth of life

Through this activity, I understand the truth of life

11×4+14×7+17×10+… +1(3n−2)(3n+1)=（　　）
A. n3n+1B. n+13n+1C. 2n−13n+1D. 2n−23n+1

The original formula is 13 (1-14) + 13 (14-17) + +13（13n−2-13n+1）=13[（1-14）+（14-17）+… +(13N − 2-13n + 1)] = 13 (1-13n + 1) = n3n + 1, so a

4: 30 3.6:2.4 9:11 / 6 4 / 15:6 / 5 ratio and simplification ratio
emergency

2:15 3:2 54:11 2:9

|The solution set of 1 / 2-x | greater than or equal to 2. | x square - 3x + 2 | less than or equal to 0

|1 / 2-x ＞ = 2, the solution is x ＜ = - 3 / 21 / 2-x ＜ = - 2, the solution is x ＞ = 3 / 2, so x ∈ (- ∞, - 3 / 2] ∪ [3 / 2, + ∞) | x square-3x + 2 | the solution set | x square-3x + 2 | less than or equal to 0 is greater than or equal to 0, so, it is to find the solution set (x-1) (X-2) = 0 x = 1 or x = 2

12 out of 12 equals 75%

12 out of 16 equals 75%

How to solve the equations of 2x + 3Y = 7,5x-y = 9
Two methods are used to solve the problem

2x+3y=7（1）
5x-y=9（2）
(2) Multiply by 3
15x-3y=27
And (1) is added
17x=34
x=2
Substituting (2)
10-y=9
y=1
So: x = 2; y = 1

(2 / 3-1 / 2 + 1 / 6) divided by 1 / 24

(2 / 3-1 / 2 + 1 / 6) × 1 / 24
=(2 / 3-1 / 2 + 1 / 6) × 24
=2 / 3 × 24-1 / 2 × 24 + 1 / 6 × 24
=16-12+4
=8

If the value of the algebraic formula (x2 + ax-2y + 7) - (bx2-2x + 9y-1) about X and y has nothing to do with the value of the letter X, find a-b

(x2 + ax-2y + 7) - (bx2-2x + 9y-1) = x2 + ax-2y + 7-bx2 + 2x-9y + 1 = (1-B) x2 + (a + 2) x-11y + 8, from the meaning of the question, 1-B = 0, a + 2 = 0, the solution is a = - 2, B = 1, so A-B = - 2-1 = - 3