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Maths-

General

Easy

Question

If $a subscript n equals sum from r equals 0 to n of 1 over n subscript C subscript r end subscript text then end text sum from r equals 0 to n of fraction numerator r over denominator blank to the power of n C subscript r end fraction$ equal to

$^{(n - 1)} a_{0}$
$n \cdot a_{n}$
$\frac{1}{2} n \cdot a_{n}$
$a_{n + 1}$

The correct answer is: $1 half n times a subscript n$

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