Question

How to divide an interval inbto n equal sub intervals?

Answer 1

The formula for this is the following: 
If you want to divide the interval [a,b] into n subintervals, the width of each subinterval will be (b-a)/n 

Here a=3, b=7, and n=3 
So the width of each subinterval is: 
(7-3)/3 = 4/3 

The first subinterval is: 
[3, 3 + 4/3] = [3, 9/3 + 4/3] = [3, 13/3] 
The second subinterval is: 
[13/3, 13/3 + 4/3] = [13/3, 17/3] 
The third subinterval is: 
[17/3, 17/3 + 4/3] = [17/3, 21/3] = [17/3, 7]