Q8 of 97 Page 192

Find the sum to indicated number of terms in each of the geometric progressions in

terms.

Given: √7, √21, 3√7 ,... n terms.


Sum of n terms of a G.P. is given by: (a: First term of G.P, r: common difference of G.P, n: Number of terms of the G.P)


First term of the Given G.P (a) = √7


Common difference of the given G.P(r) = = √3


Number of terms(n): n


Let the sum of n terms be s





∴ The sum of n terms of the given sequence is:


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