The sum of n terms of an A.P. is 3n 2 +5n. Find the A.P. Hence, find its 16th term

Question

The sum of n terms of an A.P. is 3n 2 +5n. Find the A.P. Hence, find its 16th term

in progress 0
1 month 2021-08-17T16:41:04+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-08-17T16:42:08+00:00

    Answer:S1=8,S2=22,S3=42

    Therefore the series is

    8+14+20+………..

    a=8,d=6,Tn=a+(n-1)d

    T16=8+90=98

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )