Question
If $a_{n}=\sum_{r=0}^{n} \frac{1}{{ }^{n} C_{r}}$, then value of $\sum_{r=0}^{n} \frac{n-2 r}{{ }^{n} C_{r}}$ is(a) $\frac{n}{2} a_{n}$(b) $\frac{1}{4} a_{w}$(c) $n a_{n}$(d) 0
Step 1
Step 1: We are given the sum $\sum_{r=0}^{n} \frac{n-2 r}{{ }^{n} C_{r}}$ and we need to find its value. Show more…
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