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Urgent ~ ~ ~ ~ the process of finding the answer to the required math problem 1 set in senior high school.
Analysis: 1, ∫B = {x | 3x-7≥8-2x = {x│x≥5}

A={ x | 2 ≤ x < 4 }

∴A∩B= empty set,

A ∪ b = {x | 2 ≤ x < 4, or x≥5}

2.∫A = {x | x is an integer less than 9}, B={ 1, 2,3}, C = {3,4,5,6}.

∴A∩B=[ 1,2,3}

B∩C={3}，B∪C={ 1，2，3，4，5，6}

A∩(B∪C)={ 1，2，3，4，5，6}

A ∨( B∩C)= A = {x | x is an integer less than 9},

3\A∪B refers to students who run 100 meters or students who run 200 meters.

A∩C means students who have participated in the 100 meter race and students who have participated in the 400 meter race.

9\ The title is copied wrong.

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