wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Sum of a certain number of terms of the series 29,13,12.... is 5572; Find the number.

Open in App
Solution

Here a=29 and r=13.92=32
Let the number of terms be n.
Also Sn=a(1rn)1r=5572
29,[1(3/2)n]1(3/2)=5572
or 1(32)n=5572×92×52=27532
127532=(32)n or 24332=(32)n
or (32)5=(32)n n=5

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Sum of n Terms of an AP
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon