The nth term of the sequence 1, 3, 7, 15,... can be written as

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Solution

The correct option is B
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The terms can be written as

( $2^{1}$ - 1),( $2^{2}$ - 1), ( $2^{3}$ - 1).............

$\Rightarrow$ nth term = $2^{n}$ - 1

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