Question:medium
If the sum of \( n \) terms of an A.P. is \( 3n^2 + 5n \) and its \( m^{th} \) term is \( 164 \), then the value of \( m \) is:
If the sum of \( n \) terms of an A.P. is \( 3n^2 + 5n \) and its \( m^{th} \) term is \( 164 \), then the value of \( m \) is:
Show Hint
If \( S_n = An^2 + Bn \), then the common difference is \( d = 2A \) and the first term is \( a_1 = A + B \).
Updated On: Nov 28, 2025
- \( 26 \)
- \( 27 \)
- \( 28 \)
- \( 29 \)
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