The position of rational numbers a and B on the number axis is shown in the figure, then the value of a + B ()

What about the picture?

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1. Given 1 / M + 1 / N = 1 / 6 1 / N + 1 / P = 1 / 9 1 / P + 1 / M = 1 / 15, we can find the value of MNP / Mn + NP + PM
2. The position of rational number a, B and C on the number axis is shown in the figure to find | a + B | + | B + C | - | 2b-a| The number axis looks like this ——B -- C -------- 0 -------- a -------- X this is the positive direction
3. 12/（4x²-1）+1=2x+3/1-2x
4. The second day of junior high school· x-4/x-5 + x-8/x-9 = x-7/x-8 +x-5/x-6 Simple calculation method
5. The solution equation (1) a / (x-a) B = 1 (B is not equal to 1) (2) m / x-n / (x 1) = 0 (M is not equal to N, Mn is not equal to 0)
6. Fractional equation The speed ratio of a and B was 3:4. As a result, a arrived 20 minutes earlier than B, and the speed of a and B was calculated
7. If M and N are opposite to each other, and M is not equal to 0, then the equation does not hold? A: 0 of M > 0 B: n of M = 0 C: n of M = - 1 D: n of M = 0
8. Calculation, [(M's Square-1) / M's square-4m + 4)] / (m-1 / m-2) + (m-1 / 2) Calculation, [(M2-1) of M (m2-4m + 4)] / (M2-2 of m-1) + (m2 of m-1) The answer must be m of (M + 1) (m-1) &# - M + 4
9. Decomposition factor: square of (M + 1) - square of 4m
10. Let u = {2,4,1-a}, a = {2,a2-a + 2}, if CUA = {- 1}, find the value of real number a
11. Given the length of the line Mn 6 points m (1. - 3) endpoint n, find the coordinates of N on X Need specific process
12. Given that M is reciprocal to each other, find - 2 (mn-3m ^ 2) + (mn-m ^ 2) - 2mn-2
13. Given Mn ^ 2 = - 5, find the value of - Mn (m ^ 3N ^ 7-m ^ 2n ^ 5-N)
14. Given the function f (x) = ㏒ 1 / 2 [(1 / 2) ^ X-1], it is proved that the function f (x) increases monotonically in the domain of definition
15. If the equation MX + 3 − nx − 3 = 8xx2 − 9 holds for all real numbers x except ± 3, then the value of Mn is () A. 8B. -8C. 16D. -16
16. If the equation MX + 3-nx − 3 = 8xx2 − 9 holds for any x (x ≠ ± 3), then Mn = () A. 8B. -8C. 16D. -16
17. If M = 2 - √ 3, n = √ 3 - √ 2, then the size relation of Mn is
18. If M-N = - 3 Mn = 2, then (- 5m + 2) - 5 (2mn-n)= If M-N = - 3 Mn = 2, then (- 5m + 2) - 5 (2mn-n)=
19. If (M + 2) x | m | - 1 + 8 = 0 is a linear equation with one variable, then M=______ ．
20. If m.n is the root of the linear equation with one variable, then m square n + Mn square - Mn =?