Find the sum of first 100 odd natural numbers by ap
Answers
Answered by
15
Answer:
Step-by-step explanation:
first 100 odd natural numbers: 1,3,5,7,.........99
a=1,d=2,l=99
by AP: l=a+(n-1)d
99=1+2(n-1)
98/2=n-1
49=n-1
n=50
sum = n/2(a+l)
=50/2 (1+99)
=25(100)
=2500 ans
hope for brainliest!!!!
Answered by
11
odd natural no are
1,3,5,7,...........99
a=1 , d=3-1=2 , l=99
therefore
an=a+(n-1)d
99= 1+(n-1)2
99-1=(n-1)2
98/2=n-1
49=n-1
49+1=n
n= 50
now,
Sn=n/2(a+l)
= 50/2(1+99)
= 25(100)
=2500
Sn= 2500
THANKUU ;-D
1,3,5,7,...........99
a=1 , d=3-1=2 , l=99
therefore
an=a+(n-1)d
99= 1+(n-1)2
99-1=(n-1)2
98/2=n-1
49=n-1
49+1=n
n= 50
now,
Sn=n/2(a+l)
= 50/2(1+99)
= 25(100)
=2500
Sn= 2500
THANKUU ;-D
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