Question

10. Natural numbers are divided into
groups as follows {1}, {2,3},{4,5,6},{7,8,
9, 10}......
Find i) Last number of 200th group
ii) First number of 300th group
iii) Sum of numbers in 100th group​

Answer 1

Answer:

by seeing the maths solution app then you can write all answers

Answer 2

Answer:

20100,44851,500050

Step-by-step explanation:

The images are a bit blurry.

I hope you understand the concept.