Words with cumulative meaning

Every little makes a mickle, every day (thank you for the first two answers)

What does the symbol "*" mean in mathematics

On behalf of the multiply sign

When I copy the answer, it's △ = B & # 178; - 4ac. What does △ mean?

In the discriminant of quadratic equation of one variable in mathematics, △ is the quantity of a basic discriminant

RELATED INFORMATIONS

1. ^What does this symbol mean in mathematics?
2. Find the limit of LIM (x → 0) e divided by in X
3. What does e stand for in mathematics Such as the title
4. What is e in mathematics and how much is it?
5. Calculation formula of rectangular duct's right angle bend area, such as 600 * 200 right angle bend area
6. As shown in the picture, there are five runways on the playground of Guangming primary school, with a total length of 200 meters. Each runway is 0.8 meters wide. The diameter of the semicircle at the innermost bend is 30 meters (1) What are the inner radius of the second and fourth curve respectively? (2) If the 200 meter race, standing in the fifth lane of the small army coin, standing in the second lane of the small strong start about how many meters ahead of time?
7. The perimeter of the track and field track is 400 meters. 1. The straight part of the track is selected for the 100 meter race. What is the distance for the athletes to complete the whole race? What is the displacement? 2. In the 800 meter gun race, do athletes from different runways finish the same distance? Please think about it according to the rules of track and field competition
8. The perimeter of the playground is 400m, the length of the two straight roads is 100m respectively, the length of the inner circle curve is 200m, each curve is 1m wide, and there are six runways The perimeter of jinyizhong playground is 400m, the length of two straight roads is 100m respectively, the total length of inner circle curve is 200m, the width of each curve is 1m, and there are six runways (1) how many meters is the difference between the inner ring length and the outer ring length? (2) how many meters is the difference between each runway? What rules do you find?
9. The perimeter of the track and field track is 400 meters. The straight part of the track is selected for the 100 meter race. The distance for the athletes to complete the whole race is 400 meters______ And the displacement is______ In the 800 meter race, athletes from different runways complete the whole distance______ (fill in the same or different), displacement______ (fill in the same or different)
10. The length or width of the field and equipment on the track and field field is 1.22 meters, except for the width of the track and field, the hurdle frame (springboard)
11. Words that mean "I",
12. What are the words that mean to see?
13. ＜
14. What does Y mean in mathematics?
15. y=x-In(x+1)
16. Given that the minimum positive period of the function f (x) = sin (ω x + π 3) (ω > 0) is π, then the image of the function () A. On line x = π 3 symmetry B. on point (π 3,0) symmetry C. on line x = - π 6 symmetry D. on point (π 6,0) symmetry
17. Math gurus, how is the function in calculated? It's said that we don't need to learn more mathematics in our life, but sometimes it's painful if we don't learn mathematics well. Please answer me two questions 1. How to read in X? 2. How is in X, such as in 10, calculated? In other words, what is the calculation process?
18. What does "in" mean in high school mathematics?
19. One or two
20. Mathematics anecdotes