![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
For example, how much is this | - 1.82 |
|The symbol | represents absolute value. It means that the numbers in the symbol are all positive, | - 1.82 | = 1.82
A2-B2 = equal to what (mathematical formula)
a^2-b^2=(a+b)(a-b)
Write a few mathematical formulas, what is profit equal to? What is profit rate equal to? What is principal equal to?
Profit = selling price cost
Profit margin = profit divided by cost
Principal = amount of money taken out last profit
RELATED INFORMATIONS
- 1. The mathematical formula of how many π equals how many π in primary school mathematics. For example, 1 π equals 3.14 (from 1 π to 50 π)
- 2. What is (3-x) (3 + x) expansion equal to? (a-b) (a + b) formula? What is (3-x) (3 + x) expansion equal to? The formula of (a-b) (a + b)? What is (3 + x) (3-x) expansion equal to? What is the formula of (a + b) (a-b)? Original formula = (3-x) (3 + x) =3(3-x)+x(3+x) =9-3x+3x+x² =9+x²
- 3. A, B and C set out from a and B at the same time. A and B want to walk towards each other. A walks 80 meters per minute, B walks every minute The clock walks 70 meters, and C walks 60 meters per minute. A and B meet. Two minutes later, B and C meet. How many meters are there between a and B?
- 4. What unit does s belong to in mathematics? For example, min means the same as min
- 5. What does mathematical unit mean? What does it mean?
- 6. What does m stand for in mathematical units,
- 7. A simple mathematical unit problem 3400 sq cm = 0.34 () 50 L = 0.05 ()
- 8. Rate of progression between mathematical units The abbreviation of hectare in area unit is HM & sup2;, what does HM mean?
- 9. It is known that 4 ^ 2 = a ^ 4,27 ^ 2 = 3 ^ B, instead of simple evaluation, (3a-2b) ^ 2 - (a-3b) (2a + b) + (3a + b) (3a-b)
- 10. s. What do m and H stand for?
- 11. What is the formula of the nth power expansion of (AX + by)
- 12. If the total area of the cuboid is 11 and the sum of the lengths of the twelve edges is 24, then the length of a diagonal of the cuboid is () A. 23B. 14C. 5D. 6
- 13. Let the quadratic function f (X-2) = f (- X-2), the intercept of the picture on y is 1, and the length of the line cut by X axis is 2 times of the root 2. The analytic expression of F (x) is obtained
- 14. Given f (2 / x + 1) = lgx, find f (x) = ()
- 15. A piecewise function y = x (0 ＜ x ＜ 1) y = 0 (x = 1) y = 1 / 2 of negative x (x ＞ 1) why, when 0 ＜ x ＜ 1, that is, when 1 / X ＞ 1, why does f (1 / x) = negative x equal to - x, instead of 1 / 2 of negative x? 1 / X is greater than 1. Why is it not equal to 1 / 2 of negative x
- 16. 1) If f (x) = x square + 3xf '(2), then f' (2) =? 2) Given the function f (x) = f '(π / 4) cosx + SiNx, then the value of F (π / 4) is?
- 17. If f ((1-x) / (1 + x)) = (1-x ^ 2) / (1 + x ^ 2), then f (x)=
- 18. The known function f (x) = (1-x) / (AX) + LNX (1) If a ≥ 1, it is proved that the function f (x) is an increasing function on [1, + ∞) (2) When a = 1, we prove that ln (n / (n-1)) > 1 / N for positive integer n greater than 1 There is no need to answer the first question The second question is that I change the left side into: lnn-ln (n-1), shift term, lnn-ln (n-1) - 1 / n It is proved that lnn-ln (n-1) - 1 / N > 0, but the left derivative is less than zero, as if it can not be proved,
- 19. Given the function f (x) = 1 + SiN x × cos X. (1) find the minimum positive period and monotone decreasing interval of F (x); (2) if Tan x = 2, find the value of F (x)
- 20. How to convert degrees, minutes and seconds into degrees