The sum of the first n terms of an AP is 3n² + 5n. If the mᵗʰ term of the AP is 68, then what is the value of m?

1. A.9
2. B.10
3. C.11✓ Correct
4. D.12

More Arithmetic Progression questions

• → If p^th term of an AP is k, then what is the sum of p^th term, (p + q)^th term and (p − q)^th term of the AP?
• → If the pth term of an AP is k, then what is the sum of the pth, (p+q)th and (p-q)th terms of this AP?