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ravikumar

Find general term and sum of n terms of series 9, 16, 29, 54, 103,..................

Hint : apply common difference method

Pl send detailed solution.

aditi_g

hey this ques was solved a few days be4 also just look for it....
lemme tell u in brief actually the diff of diff in in gp wid common ratio 2....
general term in taht cas is a x r ^n + b x n + c
put n as 1and r as 2 and equate it to 9 similarly
wid n=2 equate it to 16...
and wid again n=3
form 3 eqns get the value of a, b, c
get the general term and thn u can sum it up....
if u hv any doubt u can nudge me...
rate if useful

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Here's an easier approach:

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