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The sum of su...

Question

The sum of successor of 'n' and predecessor of 'n' is

A

n

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B

n^{2}

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C

2n

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D

None of these

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Solution

The correct option is C 2n
Successor of $n = n + 1.$
Predecessor of $n = n - 1.$
$∴$ Sum of $(n + 1) + (n - 1), = 2 n .$

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