Find the 7th term in the following sequence whose an = n2/2n ; a7

Question

Find the 7^th term in the following sequence whose a_n = \( \dfrac{n^2}{2^n}\); a⁷

Asked by Abhisek | 1 year ago | 75

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Class 11 Maths Sequences and Series Add Answer

Class 11 Maths Sequences and Series View Answer

Class 11 Maths Sequences and Series View Answer

If a is the G.M. of 2 and \( \dfrac{1}{4}\) find a.

Class 11 Maths Sequences and Series View Answer

Find the geometric means of the following pairs of numbers:

(i) 2 and 8

(ii) a³b and ab³

(iii) –8 and –2

Class 11 Maths Sequences and Series View Answer

Insert 5 geometric means between \( \dfrac{32}{9}\) and \( \dfrac{81}{2}\).

Class 11 Maths Sequences and Series View Answer

Accepted Answer

n^th term of the sequence is a_n = \( \dfrac{n^2}{2^n}\)

Now, on substituting n = 7, we get

a₇ = \( \dfrac{7^2}{2^7}\)

= \( \dfrac{49}{128}\)

Answered by Pragya Singh | 1 year ago