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Mathematics · 2024 · 1 mark
CBSE 2024 · Region 3 · Set 2 · Q17
If the sum of first n terms of an A.P. is $\displaystyle 3 \mathrm{n}^{2}+4 \mathrm{n}$ and its common difference is $\displaystyle 6$, then its first term is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 7$
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CBSE Class 10 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.