Question

1+2+3+4+5+................+99=
A: ( 4950 )
B :( 3246 )
C: ( 4676 )​

Answer 1

Answer will be

A: ( 4950 )

Answer 2

heya.....buddy answer is

4950

sn = n/2(a+an)

sn = n/2(a+a+(n-1)×d)

s99 = 99/2(1+1+(99-1)×1

s99 = 49.5(2+98)

s99 = 49.5×100

s99 = 4950

i got it finally.......answer:option a