Question

find the sum of nature numbers from 100 to 400​

Answer 1

Answer:

1,65,550

Step-by-step explanation:

The natural numbers from 100 to 400 forms an AP with first term 100 and common difference 1.

The number of terms in sequence 100,101,102,...,399,400 is 400-99=301.

So sum of AP is given by,

Sn = n/2(2a + (n-1)d)

Sn = 301/2(2(400) + (301-1)(1))

Sn = 301/2(800 + 300)

Sn = 301/2(1100)

Sn = 301*550

Sn = 1,65,550

This is your answer.