If (1+ x + 2 x 2 ) 20 = a 0 + a 1 x + a 2 x 2 + ....... + a…

Maths Binomial Theorem & Mathematical Induction Mix Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

If (1+ x + 2 x 2 ) 20 = a 0 + a 1 x + a 2 x 2 + ....... + a 40 x 40 fud a 1 + a 3 + a 5 + ........ + a 37 + a 39 =

None of these

Text Solution

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The correct answer is:

Put x = 1, x = – 1 and subtract then

(4) 20 – 2 20

= 2[a 1 + a 3 + ......+a 39 ]

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