Question

U is a set of natural numbers. A={x:x is a prime no} ..B={x:x is a natural no divisible by 3 and 5}...C={x[2x+5]=9}...D={x:[2x+1]>10}

Answer 1

Answer:

U= N: Set of natural numbers

(i) {x:xis an even natural number}

′

={x:x is an odd natural number}

(ii) {x:xis an odd natural number}

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={x:xis an even natural number}

(iii) {x:x is a positive multiple of 3}

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={x:x∈N and x is not a multiple of 3}

(iv) {x:xis a prime number}

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={x:xis a positive composite number and x=1}

(v) {x:xis a natural number divisible by 3 and 5}

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={x:xis a natural number that is not divisible by 3 or 5}

(vi) {x:xis a perfect square}

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={x:x∈Nand x is not a perfect square}

(vii) {x:xis a perfect cube}

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={x:x∈Nand x is not a perfect cube}

(viii) {x:x+5=8}

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={x:x∈Nand x



=3}

(ix) {x:2x+5=9}

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={x:x∈Nandx



=2}

(x) {x:x≥7}

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={x:x∈Nandx<7}

(xi) {x:xϵNand2x+1>10}

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={x:x∈Nandx≤

2

9

}

Answer 2

• I think I can help you in this question ✌️

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