Question

Sn = S30 =


(A) a, 5 - 3, - 1
(2). If first term and common difference is 10 and 5 then, complete the following activity to find the sum of the first 30 terms of the A.P.
[ ______ + (n – 1 )d ] [ 20 + (30 – 1) x ____ ]
(B) 2a, 5 (C) – 2a, – 5​

Answer 1

Step-by-step explanation:

$10 + (n - 1) \times 5$

$10 + (5n - 5)$

$(5n - 1)$

$5 \times 30 - 5$

$150 - 5$

$145$