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Write the roster form for the set A = {x : x is a letter in the word AEROPLANE which has vowels just before and after it}.

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In the word AEROPLANE, the vowels are A, E and O.
Now, the third letter i.e., R has a vowel i.e., E just before it and a vowel i.e., O just after it. Hence, it satisfies the given condition.
Now, look at letter N, which has vowel i.e., A just before it and a vowel i.e., E just after it. Hence, this letter also satisfies the given condition.
Thus, the set can be written in roster form as A = {R, N}
Ans : (A)
answered Jun 10, 2014 by thanvigandhi_1

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