CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If sum of n terms of an AP is 3n2+5n then which of its terms is 164?

Open in App
Solution

Sn=3n2+5n
S1=a1=8
S2=a1+a2=22a2=14
S3=a1+a2+a3=42a3=20

AP is 8,14,20
a=8,d=6
164=a+(m1)d=8+(m1)6
m1=26
m=27

27th term is 164

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