Question

ans it plzzzzz................​

Answer 1

Answer:

Step-by-step explanation:

• s10 = 10/2 ( 2 * 3 + 9 * 6)

= 5 ( 6 + 54)

=60 * 5  = 300

• sn = n/2 (6 + 6n - 6)

= 6n2 / 2 = 3n2 ; n = root 3