1. Find the sum of odd positive integers between 1 and 199.
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The series of odd positive integers between 1 and 99 will be in A.P; 3,5,7,9,11......193,195,197
a=3
d=2
l=197
l=a+(n-1)d
197 =3+(n-1)2
n-1=97
n=98
Sum;
=n/2(a+l)
=98/2 (3+197)
=49×200
=9800
Your answer is 9800
Hope it's help you
a=3
d=2
l=197
l=a+(n-1)d
197 =3+(n-1)2
n-1=97
n=98
Sum;
=n/2(a+l)
=98/2 (3+197)
=49×200
=9800
Your answer is 9800
Hope it's help you
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