Math, asked by jethwadivya0, 5 months ago

find the sum of AP 3,6,9....upto 18 terms

Answers

Answered by bhumikabv2004

0

Answer:

513

Step-by-step explanation:

use formula Sn = n/2 (2a + (n -1) d)

=9 (6 + (17) 3)

= 9 × 57

=513

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