Find the sum of the following arithmetic series 1,2, 3…..99,100
Answers
Answered by
4
Answer:
Step-by-step explanation:
S(100)=100/2(1+100)
=5050
Answered by
9
Answer:
605
Step-by-step explanation:
a = 1 , d = 1 , an = 100
an = a+ (n-1) d
100 = 1 + (n-1) × 1
100 = 1 + 1n -1
100 = 1n
n = 100
so, the sum =
Sn = n/2(2a+(n-1) d)
= 100/2 (2×1 +(100-1)×1 )
50 ( 2+99 )
= 100 + 505
= 605
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