The relationship between the absolute value of a number and the opposite number is expressed in symbolic language Be correct and positive

When a = 0 | a | = - (- a) = a
That is, the absolute value of a nonnegative number is itself
The absolute value of a non integer is its opposite

RELATED INFORMATIONS

1. Let f (x) = ax & # 178; + BX + C (a > 0), and f (1) = - A / 2 (1) Prove that the function f (x) has two zeros. (2) let X1 and X2 be the two zeros of the function f (x), and find the absolute value range of x1-x2. (3) prove that the function f (x) has at least one zeros in (0,2) Is to find the value range of the absolute value of x1-x2
2. The range of function y = x ^ 2-2x + 2, X ∈ [2,7] is
3. How to use the inverse function method to find the range of y = CX + D / ax + B (a ≠ 0)
4. It is known that in △ ABC, ab = 20, AC = 15, and the height of BC is 12, then the length of BC is______ ．
5. What is the full English name of NBA, PRC, VOA, EQ and WTO
6. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
7. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
8. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
9. RT triangle ABC, ∠ a = 90 °, bisector of ∠ B intersects AC at D, vertical line from a as BC intersects BD at e, and vertical line from D as DF, so aefd is proved to be diamond
10. As shown in the figure, in RT △ ABC, the bisector of ∠ a = 90 °, the bisector of ∠ B intersects AC at e, the height ah on the side of intersecting BC is at D, DF / / BC intersects AC at F through D, and the verification is: AE = FC
11. When calculating 25 + A, Xiao careless mistakenly regards + as a - sign and gets 17, then the correct answer to 25 + A is ()
12. Simple calculation of 100 * 7.9 + 184 * 2.1 + 84 * 2.9
13. K in y = KX + B is the slope. What is the slope
14. Given that point a (- 3,2a-1) and point B (B, - 3) are symmetric with respect to the origin, what is the coordinate of the symmetric point P 'of point P (a, b) with respect to the y-axis?
15. If there are only three positive integer solutions to the inequality 2x-m ≤ 0, then the range of M is?
16. How to solve the equation 50 + x = 3x
17. 8. 7 + x = 14 to solve the equation
18. On the roots of equations and zeros of functions If the square-x-1 = 0 of equation 2aX has exactly one solution in (0,1), then what is the value range of a?
19. What is 8 and 3 / 8 minus 3 and 1 / 15
20. 1. How to add or subtract 2, 3, 4, 5, 6, 7 to make it equal to 11