NDA2013MathematicsSequences and SeriesActual
If the numbers n-3,4 n-2,5 n+1 are in AP , what is the value of n ?
Options
- A1
- B2
- C3
- D4
Correct answer
A. 1
Step-by-step solution
(n-3), 4 n-2,5 n+1 are in A.P. aligned & 2(4 n-2)=(n-3)+5 n+1 & 8 n-4=6 n-2 n=1 aligned