Q1 of 97 Page 192

Find the 20th and nth terms of the G.P.

Given: G.P.


We know that in G.P an = arn-1


Here, n: number of terms


a: First term = 5/2


r: common ratio


Common ratio of the given G.P is: (∴ r = 1/2)


Here, nth team of the G.P :



∴ nth term of the given G.P. is


20th term of the given G.P. is


∴ nth and 20th term of the given G.P. are: respectively.


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