Maharashtra State BoardHSC Science (Electronics) 11th
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The numbers 3, x, and x + 6 form are in G.P. Find 20th term - Mathematics and Statistics

Sum

The numbers 3, x, and x + 6 form are in G.P. Find 20th term

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Solution

r = `6/3` = 2 or r = `(-3)/3` = – 1

tn = arn–1

∴ t20 = 3(219) or t20 = 3(– 1)19

∴ t20 = 3(219) or t20 = – 3

Concept: Geometric Progression (G. P.)
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Chapter 2: Sequences and Series - Exercise 2.1 [Page 28]
Q 13. (ii)
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Balbharati Mathematics and Statistics 2 (Arts and Science) 11th Standard Maharashtra State Board
Chapter 2 Sequences and Series
Exercise 2.1 | Q 13. (ii) | Page 28
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