Question

Sum the following series :
(i) 2 + 4 + 6 + ...... to n terms
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Answer 1

$\large {\blue {Answer :- }}$

$2 + 4 + 6 +......+ n </p><p>= n(n + 1)$

Answer 2

a = 2

d = 2

Sn = 2a + ( n - 1) d

Sn = 2 × 2 + ( n - 1) × 2

Sn = 4 + 2n - 2

Sn = 2 + 2n

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