Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10th
Advertisement Remove all ads

Write the first three terms of the G.P. whose first term and the common ratio are given below a = 1000, r = 25 - Mathematics

Sum

Write the first three terms of the G.P. whose first term and the common ratio are given below

a = 1000, r = `2/5`

Advertisement Remove all ads

Solution

a = 1000, r = `2/5`

tn = arn-1

t1 = ar1-1 = ar= 1000 × 1 = 1000

t2 = ar2-1 = ar = `1000 xx 2/5` = 400

t3 = ar3-1 = ar2 = `1000 (2/5)^2`

= `1000 xx 4/25`

= 160

∴ The 3 terms are 1000, 400, 160, …

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Samacheer Kalvi Mathematics Class 10 SSLC Tamil Nadu State Board
Chapter 2 Numbers and Sequences
Exercise 2.7 | Q 2. (iii) | Page 72
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×