# For the G.P., if r = 13, a = 9, find t7. - Mathematics and Statistics

Sum

For the G.P., if r = 1/3, a = 9, find t7.

#### Solution

Given, r = 1/3, a = 9

tn= arn–1

∴ t7 = 9 xx (1/3)^(7 - 1)

= 9/3^6

= 1/81.

Concept: Sequence and Series - Geometric Progression (G.P.)
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#### APPEARS IN

Balbharati Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board
Chapter 4 Sequences and Series
Exercise 4.1 | Q 2. (i) | Page 50