The sun of all even number up to 100 is:
- 2500
- 2550
- 2050
- none
Explanation
Here we need sum of 2,4,6,……..,98(between 1 and 100)
Now here First term = 2 difference= 2, n = 50
So now sum of these terms = n/2(2a+(n-1)d)
= 49/2(2*2+(50–1)2)
= 49/2(4+(49)*2)
= 49/2(4+98)
= 49/2(102)
= 49*51
=2550
ND22-6-2023
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