Question

Find the sum of all natural numbers between 100 and 1000

Answer 1

Step-by-step explanation:

hopes it helps you.....

Answer 2

Answer:

AP: 101, 102,....999

Here, a=101, d=1, an=l=999

As, an=a+(n–1)d

so, 999=101+(n–1)

n=899

as, Sn=n/2(a+l)

=899/2(101+999)

=889×550

=4,88,950

So, the sum of all the natural numbers between 100 and 999 is 488950