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Let A={varphi,{varphi},1,{1,varphi},2}do...

Let `A={varphi,{varphi},1,{1,varphi},2}dot` Which of the following are true? i.`varphi ∈A` ii. `2subA` iii. `{2,{1}}subA`

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Let A={varphi,{varphi},1,{1,varphi},2}dot Which of the following are true? i. {1}sub A ii. {{varphi}}subA iii. {2,varphi}subA

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Let A={a , b ,{c , d},\ e} . Which of the following statements are false and why? (i) a in A (ii) asubA (iii) {a , b , e}subA

Let A={{1,2,3},\ {4,5},\ {6,7,8}}dot Determine which of the following is true or false: (i) 1 in A (ii) {1,2,3}subA (iii) {6,7,8} in A

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Let A ={1,2,{3,4},5} . Which of the following statements are incorrect and why ? (i) {3,4} subA (ii) {3,4} in A (iii) {{3,4}}sub A (iv) 1 in A (v) 1 sub A (vi) {1,2,5} sub A (vii) {1,2,5} in A (viii) {1,2,3} sub A (ix) phi in A (x) phi sub A (xi) {phi} sub A .

Let A={a , b ,{c , d},\ e} . Which of the following statements are false and why? (i) {c , d}subA (ii) {c , d} in A (iii) {{c , d}}subA

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Let A={{1,2,3},\ {4,5},\ {6,7,8}}dot Determine which of the following is true or false: (i) {{4,5}}subA (ii) varphi in A (iii) varphisubA

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