Question

1+3+5+7.......................15पदो तक

Answer 1

Hy friend ur answer is 120.

(^o^)

Answer 2

a = 1

d = 2

n= 15

So, Sn = n/2{2a + (n-1)d}

Sn = 15/2{2×1 + (15-1)2}

Sn = 15/2 × (2+28)

Sn = 15/2× 30

Sn = 15 × 15

Sn = 225......●

Hope it was helpful.