If the sum of $n$ terms of an AP is ${3 n}^{2} - n$ and its common difference is $6$ , then its first term is

2

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3

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1

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Solution

The correct option is A $2$
$s_{n} = {3 n}^{2} - n g i v e s s_{1} = 3 - 1 = 2$
$∴ a = 2$

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If the sum of n terms of an AP is 3n2−n and its common difference is 6, then its first term is

The correct option is A 2sn=3n2−ngivess1=3−1=2∴a=2

If the sum of $n$ terms of an AP is ${3 n}^{2} - n$ and its common difference is $6$ , then its first term is

The correct option is A $2$
$s_{n} = {3 n}^{2} - n g i v e s s_{1} = 3 - 1 = 2$
$∴ a = 2$