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Anonymous users2024-02-112.（1）2x-1=0
2x=1x=1/2
Let the set be a, which can be obtained according to the title.
a=2）4（x+1）-3（x-1）=2
4x+4-3x+3-2=0
x+5=0x=-5
Let the set be B, which can be obtained according to the title.
b=3）x^2-5x+4=0
x-1)(x-4)=0
x=1 or 4, let the set be c, according to the meaning of the title. c=
b=,c=1）a∩b=，b∩c=，a∩c=∅
2）a∪b=
b∪c=a∪c=
5.∩ a b ∪ a b
a ba ∅ a ∅ a a a ab
b ∅ b b b ab b
6.Solution: According to the topic.
a=，b=a∩b=
7.Solution: According to the topic.
a=，b=a∩b=，a∪b=
8.(1) Solution: cua=
cub=cua∩cub=
cua∪cub=
2) Proof of: a b=
cu(a∩b)=
Obtained from (1).
cua∪cub=
cu(a∩b)=cua∪cub
Proof: a b=
cu(a∪b)=
Obtained from (1).
cua∩cub=
cu(a∪b)=cua∩cub
9.Empty set: (3).
Limited set: (1) (4).
Infinite set: (2).
10.(1) 2) Contained in (3) z r (4) Contained in.
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Anonymous users2024-02-10What is above the first question?
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Anonymous users2024-02-09The answer is in your math book.
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Anonymous users2024-02-08<>3 and 1 are good to justify and explain, 2 is not easy to understand, and the spring sky is not easy to calculate.
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Anonymous users2024-02-07The greatest common factor of 3 and 21 is 3. (3 and 21 are divisible at the same time, where 3 is the largest, then the greatest common factor of 3 and 21 is 3).
The greatest common factor of 25 and 40 is 5. (25 and 40 are divisible at the same time, where 5 is the largest, then the greatest common factor of 25 and 40 is 5).
The greatest common factor of 12 and 18 is 6. (25 and 18 are divisible at the same time, where 6 is the largest, then the greatest common factor of 12 and 18 is 6).
The greatest common factor for 18 and 19 is 1. (18 and 19 are only divisible by 1 at the same time, so the greatest common factor of 18 and 19 is 1).
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Anonymous users2024-02-063，21
The greatest common factor is 3
The greatest common factor is 5
The greatest common factor is 6
The greatest common factor is 1
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Anonymous users2024-02-05<> the state of the vertical sensitive sail branch rush.
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Anonymous users2024-02-04The last question, it should be +y, right?
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