After listening to the story, we all burst into laughter I will definitely give you points

After listening to the story, we all burst into laughter I will definitely give you points

After listening to the story, we couldn't help laughing

After listening to this story, I burst into laughter
Yes, now

Coincidentally, it can't be used when there is only one person. It means that many people do the same action at the same time without discussion
After listening to this story, we all burst into laughter

Definite integral 0 to π x * ((sin (x)) ^ 2 - (sin (x)) ^ 4) ^ (1 / 2)

First use the formula to remove x, as shown in the figure, and then use the symmetric property to halve the integral interval

Multiply any three numbers from - 5,1, - 3,5, - 2, where the largest product is______ The smallest product is______ ．

In the number - 5, 1, - 3, 5, - 2, take any three numbers to multiply, where the largest product must be a positive number, that is (- 5) × (- 3) × 5 = 75, and the smallest product is a negative number, that is (- 5) × (- 3) × (- 2) = - 30

A mathematical problem about factorization (formula method)
Given (A & sup2; + B & sup2;) (A & sup2; + B & sup2; - 8) + 16 = 0, find the value of a & sup2; + B & sup2
o(∩_ ∩)o .

Let t = A & sup2; + B & sup2;
t(t-8)+16=0,
t²-8t+16=0,
(t-4)²=0,
t=4,
That is a & sup2; + B & sup2; = 4
Simple application of integral method

For a 2-digit number, the number on the one digit is a, and the number on the ten digit is (a is greater than B). Exchange the number on the two digits of the 2-digit number to get a new 2-digit number
(1) The difference between the new number and the original two digits
(2) Now we give three numbers a.21; b.27; c.32. Which of a, B, C. do you think the new number and the original number may be and why

(1) The original two digits are: 10B + a
The new double digits are: 10A + B
The difference between the new number and the original number is: (10a + b) - (10b + a) = 9a-9b
（2）B
Because a is greater than B, that is, the number in one digit is greater than that in ten digit

Solving inequality (1) x ^ - 2x + 30 (3) x ^ w-2x + 1 > 0
（1）x^-2x+30
(3)x^w-2x+1>0

（1）x^-2x+3-1
Certainly
So the solution set is r
(3)x^2-2x+1>0
（x-1)²>0
Then X-1 ≠ 0
x≠1

1. Fill in
(1) there are () 1 / 5 out of 3 and 1 / 5, and 8 1 / 4 out of 8 are ()
(2) 5 = 3 of () = 12 of () = 4 and 2 of ()
2. Go into life,
Divide a 2 hectare vegetable field into 8 parts on average. How many hectares is each part? Among them, 3 parts are planted with rape, and how much of the area is planted with rape

1.（1）16 2 (2) 15 60 2
2.2 divided by 8 is a quarter
One eighth times three equals three eighths

What is the central coordinate formula of triangle ABC in space rectangular coordinate system and plane rectangular coordinate system?
I haven't learned it, but I need to use it in some places,
Ha ha, wrong number. It's the center of gravity, not the center.

Space rectangular coordinate system: ((x1 + x2 + x3) / 3, (Y1 + Y2 + Y3) / 3)
Plane rectangular coordinate system: ((x1 + x2) / 2, (Y1 + Y2 +) / 2)

For real numbers x and y, if P: x + y ≠ 8, Q: X ≠ 2 or Y ≠ 6, then p is the ()
A. Sufficient and unnecessary condition B. necessary and insufficient condition C. sufficient and necessary condition D. are all wrong

If x = 2 and y = 6, then: x + y = 8, if x = 1 and y = 7, then: x + y = 8, but x = 2 and y = 6 do not hold, so ￢ q is a sufficient and unnecessary condition of ￢ P. so p is a sufficient and unnecessary condition of Q, so a