Answer:
The sum of the whole numbers from 1 to 720 is 259560.
Step-by-step explanation:
To find : The sum of the whole numbers from 1 to 720 ?
Solution :
The whole numbers from 1 to 720 form an arithmetic progression,
The first term is a=1
The last term is l=720
The number of terms n=720
The sum formula of A.P is
[tex]S_n=\frac{n}{2}[a+l][/tex]
Substitute the values in the formula,
[tex]S_{720}=\frac{720}{2}[1+720][/tex]
[tex]S_{720}=360\times 721[/tex]
[tex]S_{720}=259560[/tex]
Therefore, The sum of the whole numbers from 1 to 720 is 259560.
