Mathematics · 2022
JEE Main · 25 June 2022, Shift 2 · Q8
The sum 1+2 · 3+3 · 3^2+… …..+10 · 3^9 is equal to:
The sum $\displaystyle 1+2 \cdot 3+3 \cdot 3^2+\ldots \ldots . .+10 \cdot 3^9$ is equal to :
Official answer
(2)
$\displaystyle \frac{19 \cdot 3^{10}+1}{4}$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.