51
If the sum of the first 'n' terms of an AP is $2n^2 + 5n$, then its common difference is :
- (a)$2$
- (b)$4$
- (c)$5$
- (d)$7$
Show SolutionHide Solution↓
(B) $4$
If the sum of the first 'n' terms of an AP is 2n2 + 5n , then its common difference is :
CBSE Class 10 Maths PYQ · Arithmetic Progressions · Sum Formula · 1 Mark · July 2025 · Standard
Solve it yourself first — then press ↓ or tap Show Solution. Use ← → for previous / next question.