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Question

Question: The sum of the series <sup>10</sup>C<sub>1</sub>. 4 + <sup>10</sup>C<sub>2</sub> 4<sup>2</sup> + …… ...

The sum of the series 10C1. 4 + 10C2 42 + …… + 10C10 410 is

A

210

B

510

C

210–1

D

510 –1

Answer

510 –1

Explanation

Solution

(1 + 4)1010C0 = 510 – 1