Question

If the sum of'n' terms of an APbe
${3n}^{2}$
+n. What is its first term.
​

Answer 1

$\huge\purple{\underline{\underline{\pink{Ans}\red{wer:-}}}}$

$\sf{First \ term \ is \ 4}$

$\sf\orange{Given:}$

$\sf{\implies{Sn=3n^{2}+n}}$

$\sf\pink{To \ find:}$

$\sf{First \ term.}$

$\sf\green{\underline{\underline{Solution:}}}$

$\sf{\implies{Sn=3n^{2}+n}}$

$\sf{\implies{\therefore{S1=3(1)^{2}+1}}}$

$\sf{\implies{S1=3+1}}$

$\sf{\implies{S1=4}}$

$\sf\purple{\tt{\therefore{First \ term \ is \ 4}}}$

Answer 2

Step-by-step explanation:

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