Question

find the sum of hundred odd numbers starting with 1

Answer 1

hii here is ur solution

the odd no. = 1,3,5,7,............

it is releted to A. P.

so,

a1 = 1, a2 = 3

common difference = 2

Sn = S100

$\frac{100}{2} (2 \times 1 + (100 - 1) \times 2$
$50(2 + (99 \times 2)$
$50(2 + 198) = 50 \times 200$
$10000$
hope it helps you....