On the line segments a and B, mark 0 at point a and 2002 at point B, which is called the first operation, and then mark (0 + 2002) △ 2 = 1001 at the midpoint C of AB, which is called the second operation; mark half of the sum of numbers marked at both ends of the corresponding line segments at the midpoint D and e of the obtained line segments AC and BC, namely (0 + 1001) △ 2 = 500.5 and (1001 + 2002) △ 2 = 1501.5, which is called the third operation, So after 11 operations, what is the sum of all the numbers marked on line AB?

Does operation mean taking the midpoint of each small segment? If so, there are 2 ^ 10 small segments in the whole segment
There are 2 ^ 10 + 1 points in total. There are 2 ^ 9 groups of symmetry about point C, and the sum of each group is 2002
So the result is 2 ^ 9 * 2002 + 1001
Am I right?

What does frequency mean? What does frequency mean?

Frequency refers to the number of occurrences of a certain item or group, which is an intuitive quantity; frequency refers to the proportion of the group in the whole population. Frequency / total = frequency, so the total number of frequencies must be equal to 1

25 plus 25 is equal to

What is the C language expression of the mathematical formula A / (b * c)?

A / (b * c) is OK. The arithmetic operators are consistent

3 - 5, 7 - 13. What are four numbers equal to 24 or minus 24?

(7+(-5)*(-13))/3=24(7+((-5)*(-13)))/3=24(7+(-13)*(-5))/3=24(7+((-13)*(-5)))/3=24((-5)*(-13)+7)/3=24(((-5)*(-13))+7)/3=24((-13)*(-5)+7)/3=24(((-13)*(-5))+7)/3=24

The square of equation x = 3 times the root sign 5 times the root of X

x ² = （3√5）x
x ² - （3√5）x = 0
x（x - 3√5）= 0
x = 0 x - 3√5 = 0
x1 = 0 x2 = 3√5

75 degrees equals () minutes equals () seconds

75 degrees equals (4500) minutes equals (270000) seconds
Big change small, multiply into rate

4x △ 3.6 = 11.8
4x÷3.6＝11.8
solve equations

4x=11.8×3.6
x=42.48÷4
x=10.62

Simple calculation 1 3 / 21 - 5 / 23 + 8 / 21 - 18 / 23

3/21+8/21 - (5/23+18/23)
=11/21 - 23/23
=11/21 - 1
=11/21 - 21/21
=- 10/21
If your title is 13 / 21 -
That's 13 / 21 + 8 / 21 - (5 / 23 + 18 / 23)
=21/21 - 23/23
=1 - 1
=0

In △ ABC, where a, B and C are the opposite sides of ∠ a, B and C respectively, and cosa = 45, sinbsina = B2, the maximum area s of △ ABC is______ ．

In △ ABC, sinbsina = Ba, ∵ sinbsina = B2, ∵ Ba = B2 can be obtained from sine, and the solution is a = 2. From cosine theorem, A2 = B2 + c2-2bccosa, ∵ 22 = B2 + C2 − 85bc ≥ 2BC − 85bc = 25BC can be reduced to BC ≤ 10. If and only if B = C = 10, the equal sign is taken. ∵ cosa = 45, ∵ Sina = 1 − cos2a = 35. ∵ s △ ABC = 12bcsina = 310bc ≤ 310 × 10 = 3, and the equal sign is taken if and only if B = C = 10 The maximum value of area s is 3