Q1 of 105 Page 155

For each geometric progression find the common ratio ‘r’, and then find a_n
3, ,,…..

First term (a) = 3

Common ratio (r) = =

n^th term in the GP (a_n) = ar^n-1

a_n = 3^n-1

Which of the following are GP? If they are in GP. Write three more terms?

0.4, 0.04, 0.004, ……

Find x so that x, x+2, x+6 are consecutive terms of a geometric progression.

For each geometric progression find the common ratio ‘r’, and then find a_n

2, -6, 18, -54….

For each geometric progression find the common ratio ‘r’, and then find a_n

-1, -3, -9, -27….

Questions · 105

6. Progressions

1 1 1 1 2 2 2 2 2 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 1 2 2 3 3 3 3 3 4 5 5 6 7 8 9 10 11 12 13 14 15 16 17 1 1 1 1 2 2 2 3 3 3 3 3 3 3 4 5 6 7 7 8 9 10 11 12 13 14 1 1 1 2 2 2 2 3 3 3 3 3 3 3 3 3 4 1 1 1 1 2 3 3 4 4 4 5 6 7

For each geometric progression find the common ratio ‘r’, and then find an3, ,,…..