Question

Find the common ratio, 5th term and nth term of the following GPs: a) 1,2,4,.... b) 9,6,4,...​

Answer 1

Answer:

Step-by-step explanation:

common ratio =a2/a1=9/3=3

5th term of gp=ar power n-1

=a(r)^5-1

=a(r)^4

=3(3)^4

=243

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Answer 2

Answer:

a) 5th term of an GP is ar^4= 16

nth term of this GP = r^n-1

b) 5th term of an GP is 16/9

nth term is = 9*(2/3)^n-1