Question

a=2,d=2 find s15 plz find answer
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Answer 1

Given:

d = 2

a = 2

So , S15 = 15/2 ( 2 x a + (n-1)d )

=} 15/2( 2 x 2 + (15-1) x 2 )

=} 15/2 ( 4 + 28 )

=} 15/2 x 32

=} 15 x 16

=} 240

So 240 is the answer

Hope it helped...

Answer 2

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

a = 2,d = 2

S15 = 15/2[2(2)+(15-1)2]

= 15/2 [4 + 28]

= 15/2 [32]

= 15 x 32 /2

= 480 /2

= 240....

is your answer....

hope it help you