Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10th

# Identify the following sequence is in G.P.? 120, 60, 30, 18, … - Mathematics

Sum

Identify the following sequence is in G.P.?

120, 60, 30, 18, …

#### Solution

120, 60, 30, 18, …

r = ("t"_2)/("t"_1) = ("t"_3)/("t"_2) = ("t"_4)/("t"_3)

Here r is not equal i.e. 60/120 = 30/60 ≠ 18/30

∴ It is not a G.P.

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#### APPEARS IN

Samacheer Kalvi Mathematics Class 10 SSLC Tamil Nadu State Board
Chapter 2 Numbers and Sequences
Exercise 2.7 | Q 1. (vi) | Page 72