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Find the indicated term in the following sequence whose nth term is: an=n22n; a7 - Mathematics

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Question

Find the indicated term in the following sequence whose nth term is:

`a_n = n^2/2^n`; `a_7`

Sum
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Solution

an = `"n"^2/2^"n"`

Substituting n = 7, we obtain

a7 = `7^2/2^7`

= `49/128`

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Chapter 9: Sequences and Series - Exercise 9.1 [Page 180]

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NCERT Mathematics [English] Class 11
Chapter 9 Sequences and Series
Exercise 9.1 | Q 8 | Page 180
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