Question

find k if k+9 ,2k-1,2k+1 are consecutive form of an AP

Answer 1

2k-1-(k+9) = 2k+1-(2k-1)

on solving you get the value of k

thank you

Answer 2

2k+1-(2k-1)=2k-1-(k+9)
2k+1-2k+1=2k-1-k-9
2=k-10
k=2+10
k=12...
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