the term which has greatest coefficient in the expansion of (x+a)^8 is a)3rd b)4th c)5th d)6th

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the term which has greatest coefficient in the expansion of (x+a)^8 is a)3rd b)4th c)5th d)6th

Suman kumar 6th Dec, 2019

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Answer (1)

Rakesh Sai 6th Dec, 2019

Hi

The greatest coefficient is 4 th term option b

We know that the formula for greatest coefficient is

If we consider n = 8

Then there are n+1 terms.

Here there 9 terms as there are odd number of terms the term with greatest coefficient is n/2 th term.

here n/2 = 4

Hence 4th term's coefficient is greatest.

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