Question

what u will get when u add 1+2+3+4+5+6+7+8+9+10+11............+99=?​

Answer 1

Answer:

99(99+1)/2=99*100/2=99*50=4950

Step-by-step explanation:

sum of n term =n(n+1)/2

Answer 2

n(n+1)/2=99×100/2=4950