Question

First term and common difference of an A.P. are 6 and 3 respectively; find S27. ​

Answer 1

Step-by-step explanation:

HEY MATE.......

$solution : \\ \\ given \: a = 6 \\ \\ d = 3 \\ \\ \implies \: s27 = \frac{n}{2} (2a + (n - 1)d) \\ \\ \implies \: s27 = \frac{27}{2} (2 \times 6 + 26 \times 3) \\ \\ \implies \: \frac{27}{2} (12 + 78) \\ \\ \implies \frac{27}{2} (90) \\ \\ \implies1215$

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Answer 2

Answer:

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