Given u = R, a = {x | X1}, find: (1) CUA; (2) a ∩ (cub)

Given u = R, a = {x | X1}, find: (1) CUA; (2) a ∩ (cub)

（1）CuA={x|x≥2}
（2）CuB={x|x≤1}
∴A∩（CuB）={x|x＜2}∩{x|x≤1}
={x|1≤x＜2}
I hope my answer will help you
（1）CuA={x|x≥2}
（2）CuB={x|x≤1}
∴A∩（CuB）={x|x＜2}∩{x|x≤1}
={x|x≤1}
Given the complete set u = R, a = {x | x ＜ 1 or X ＞ 3}, B = {x | 0 ＜ x ＜ 5} find a ∩ B, CUA, cub,
We know the complete set u = R, a = {x | x ＜ 1 or X ＞ 3}, B = {x | 0 ＜ x ＜ 5}
Find a ∩ B, CUA, cub, Cu (a ∩ b), Cub ∩ a
They are the same children who rush to do their homework
A ∩ B = R, CUA = 1 ≤ x ≤ 3, Cub = x ≤ 0 or X ≥ 5, Cu (a ∩ b) = x ≤ 0 or 1 ≤ x ≤ 3 or X ≥ 5, Cub ∩ a = x ≤ 0 or X ≥ 5
Eight year mathematics volume I 50 problems of factoring difficulty calculation
X "± 5x ± 6x" ± 10x ± 24x "± 15x ± 54x" ± 20x ± 96x "± 25X ± 150. The absolute value of the first term and the constant term remains unchanged. If the two terms are positive and negative, they will get four. There are four cases in all. The total is four, five, twenty
Simplification: A's square + 2Ab + B's square of A-B's Square / A + B's 2a-2b
Square of a + 2Ab + square of b square of A-Square of B / A + 2a-2b of B
=(a²-b²)/(a²+2ab+b²)÷(2a-2b)/(a+b)
=(a-b)(a+b)/(a+b)²÷2(a-b)/(a+b)
=1/2
1. [2x ^ 2 - (x + y) (X-Y)] [(- X-Y) (- x + y) + 2Y ^ 2] where x = - 1, y = - 2
2、3m(x-y)-n(y-x)
3、(3a^3)^3-7a^5[a^4-a(4a^3-1)]
The above question seeks the solution, hoped has the heart person to help, and writes the process, here thanks!
1, original formula = [2x ^ 2 - (x ^ 2-y ^ 2)] [(x ^ 2-y ^ 2) + 2Y ^ 2] = (x ^ 2 + y ^ 2) (x ^ 2-y ^ 2) = x ^ 4-y ^ 4 = 1-16 = - 152, original formula = 3M (X-Y) + n (X-Y) = (3m + n) (X-Y) 3, original formula = 27a ^ 9-7a ^ 9 + 7a ^ 6 (4a ^ 3-1) = 20A ^ 9 + 28a ^ 9-7a ^ 6 = 48A ^ 9-7a ^ 6
Make a mistake..
1. The original formula = 2 (X & sup2; + Y & sup2;)
When x = - 1, y = - 2, the original formula is 10
2.3m(x-y)-n(y-x)=3m(x-y) +n(x - y)=(x- y)(3m+n)
Three
1、[2x^2-(x+y)(x-y)][(-x-y)(-x+y)+2y^2]
=(2x^2-x^2+y^2)(x^2-y^2+2y^2)
=(x^2+y^2)^2
=(1+4)^2
=25
2、3m(x-y)-n(y-x)
=3m(x-y)+n(x-y)
=(3m+n)(x-y)
3、(3a^3)^3-7a^5[a^4-a(4a^3-1)]
=27a^9-7a^9+7a^6(4a^3-1)
=20a^9+28a^9-7a^6
=48a^9-7a^6
=a^6(48a^3-7)
Decomposition factor: square of a + 2Ab + square of B + 2A + 2B
Square of a + 2Ab + square of B + 2A + 2B
=（a+b）²+2（a+b）
=（a+b）（a+b+2）
（a+b+1）^2-1
=(a+b)(a+b-2)
(a+b)*(a+b+2)
A20-a19-a18 -. - A-1 when a = 2
A20-a19-a18 -. - A-1 is the 20th power of a when a = 2
2^20-2^19-2^18-…… -2-1 let x = 1 + 2 + 4 + 8 + 2 ^ 18 + 2 ^ 19: 2x = 2 + 4 + 8 + + 2 ^ 18 + 2 ^ 19 + 2 ^ 20 minus: x = 2 ^ 20-1 = 1 + 2 + 4 + 8 + + 2 ^ 18 + 2 ^ 19 so: 2 ^ 20-2 ^ 19-2 ^ 18 - -2-1＝2^20－（2^19＋2^18＋… +2+1...
(a-b) / (2a + 2b) - (a square + b square) / (a square - b square) calculation
Find 100 factorization
Factorization (x + 2) (x-3) + (x + 2) (x + 4) =. 41. Factorization 2ax2-3x + 2ax-3 =. 42. Factorization 9x2-66x + 121 =. 43. Factorization 8-2x2 =. 44. Factorization x2-x + 14 =. 45. Factorization 9x2-30x + 25 =. 46
Calculation: (1) (- a) 2 · (A2) 2 ﹣ A3 (2) (- 2009) 0 × 2 ﹣ 12 + (- 13) - 2 ﹣ 2-3 (3) (2a + 1) 2 - (2a + 1) (- 1 + 2a)
(1) (2) the original formula = 1 × 2 × 2 + 9 × 8 = 4 + 72 = 76. (3) the original formula = 4a2 + 4A + 1-4a2 + 1 = 4A + 2