Question

if A={x:x is an even number}. B={ x:x is an odd number} c={ x:x is an prime number} D={x:x is a multiple of 5} find A union B,A intersection B,C-D,A intersection C​

Answer 1

A={2,4,6,8,10………}. B={1,3,5,7,9,11……}. C={2,3,5,7,11,13…..}. D={5,10,15,20,25……..}. Find A union B={1,2,3,4,5,6,7,8,9,10…..}. A intersection B ={ }. C - D={2,3,7,11,13….}
A intersection C={2}
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Answer 2

Answer:

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Explanation:

A={x:xis a natural number}={1,2,3,4,5.....}

B={x:x is an even natural number}={2,4,6,8.....}

C={x:x is an odd natural number}={1,3,5,7,9.......}

D={x:xis a prime number}={2,3,5,7....}

(i) A∩B={x:x is a even natural number}=B

(ii) A∩C={x:x is an odd natural number}=C

(iii) A∩D={x:x is a prime number}=D

(iv) B∩C=ϕ

(v) B∩D={2}

(vi) C∩D={x:xis odd prime number}