Mathematical problems (- 8.2) + 10 + 2 + (- 1.8), (0.8) + (0.7) + (- 2.1 = 0.8 + 3.5) 1 / 4 + (- 2 / 3) + 4 / 5 + (- 1 / 4) + (- 1 / 3) in addition, who has the answer to the mathematics exercise book of the second semester of grade 6? I want 5.5.6 from Shanghai OK, I'll give 100. If I can't play that much, it's 5.4

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• 1. 3 * 3-1 * 1 = 8 * 1 5 * 5-3 * 3 = 8 * 2 7 * 7-5 * 5 = 8 * 3... How to describe and prove such a rule in words 3 * 3-1 * 1 = 8 * 1 5 * 5-3 * 3 = 8 * 2 7 * 7-5 * 5 = 8 * 3... How to describe and prove such a rule in words?
• 2. 5^6*5^-3=5^6*1/5^3=5^6/5^3=5^6-3=5^3=5^6+(-3) 7^4/7^-2=7^4/1/7^2=7^4*7^2=7^4+2=7^6=7^4-(-2) 1) Is the calculation of the above two cities correct? (2) According to the above operation process, do you have any new understanding of a ^ m * a ^ n = a ^ m + n (m, n are positive integers), a ^ m / A ^ n = a ^ M-N (m, n are positive integers, and M > N, a ≠ 0)? (3) It is to calculate with the new knowledge you get: ① the - 3rd power of 3 * the - 2nd power of 3; ② the - 7th power of 8 / the - 4th power of 8
• 3. Suppose 1 = 5, 2 = 6, 3 = 7, 4 = 8, 5 =? Additional questions: 10 =? Intelligence questions It's all about intelligence. It's not that simple
• 4. Let u = R, a = {x | x2-5x-6 = 0}, B = {x | - a ＜ X-5 ＜ a}, and 11 ∈ B, why (CUA) UB = R
• 5. Let u = {x | X be less than or equal to 5, and X belong to n *}, a = {x | x ^ 2-5x + q = 0}, B = {x | x ^ 2 + PX + 12 = 0}, and (CUA) UB = {1,2,3,4,5} Finding p q Is the question wrong? It's impossible,
• 6. If a = {X / x = a + B = ab-3, a, B ∈ (0, + ∞)} complete set u = R, then CUA=
• 7. Let u = R, a = {x | x ≠ 1}, then CUA=
• 8. The complete set u = AUB = {1.3.5.7.9}, an (cub) = {3.7}, and (CUA) NB = {5.9} is known=
• 9. If a (a is not equal to 0) is a solution of the quadratic equation of one variable X & # 178; - 3x + M = 0, - A is a solution of the quadratic equation of one variable X & # 178; + 3x-m = 0, find the value of A
• 10. Mx-a = 3x-b (M is not equal to 3)
• 11. To solve the equations: 3x + 4Y = 115x − y = 3
• 12. 1. Given the equation x ^ 2-5x-1 = 0 about X, find (1) x ^ 2 + 1 / x ^ 2 (2) x + 1 / X Given x + 3Y + 5Z = 0 2x + 3Y + Z = 0 XYZ ≠ 0, find (2y-x) (2Y + x) △ Z ^ 2 (Z ^ 2 is the square of Z) 3. Factorization: (1) (X-Y + Z) ^ 2 - (x + Y-Z) ^ 2 (2)x^3+6x^2+11x+6
• 13. X-x square + 6 < 0
• 14. How to solve the problem of x square - x ＞ 6
• 15. The solution of x square + X-6 < 0
• 16. Mathematics problem! Solving inequality (process) 4x-2≥5x+7 x+15>2x-3 6（x+2)≤3x-1 5（x+2)≤6x+1 3x-1≥6x-2 5(x+2)3x+20 x-5/4 +1≤6x-2 3x+4>x/2 -1
• 17. 1、 (x-1) (x + 2)
• 18. For the first problem of 1QB, if the set of inequality (3a-2) x ＜ 1 about X is x ＜ 2, then the value of a is_____
• 19. 1 + 1 / radical 2 + 1 / radical 3 +. + 1 / radical n I'm very grateful to so many warm-hearted people, but I said that I'm a freshman in high school and I still can't use induction, but I'm very grateful
• 20. A mathematical problem of inequality in senior one If two angles a and B satisfy - π / 2