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Question-216786




Question Number 216786 by mnjuly1970 last updated on 20/Feb/25
Answered by mehdee7396 last updated on 21/Feb/25
suppose  a,b,c∈A  a+b=p  (i)  &  a+c=q  (ii)  &   b+c=m  (iii) ; p,q,m∈Q  (i)−(ii)→b−c=p−q  (iv)   (iv)+(iii)→2b=p−q+m∈Q     ⇒b∈Q  it is  incorrect
supposea,b,cAa+b=p(i)&a+c=q(ii)&b+c=m(iii);p,q,mQ(i)(ii)bc=pq(iv)(iv)+(iii)2b=pq+mQbQitisincorrect
Commented by mnjuly1970 last updated on 21/Feb/25

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