Question

DOULOU.
If 3+k,18-,5k +1 are in A.P. then find k.​

Answer 1

ANSWER:—

✶

If the following terms are in AP then the common difference between them is same..

So

a2-a1=a3-a2

18-k-3-k=5k+1-18+k

15-2k=6k-17

-2k-6k=-17-15

-8k=-32

so

k=4

thanks

hope this will you help