1+3+5+7.......................15पदो तक
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Hy friend ur answer is 120.
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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.
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.
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