Check if the sequence is an AP $1, 3, 9, 27, . . . .$

Yes, it is an AP

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Data Insufficient

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Ambiguous

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Solution

The correct option is A No
Given series is $1, 3, 9, 27, . . . .$
We have, $3 - 1 = 2$
$9 - 3 = 6$
$27 - 9 = 18$
This shows that the difference of a term and the preceding term is now always same. Hence, the given sequence is not an AP.

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