The provincial :

1 + 2 + 3 +...............+ 2015 + 2016

Help me

We have :

\(\dfrac{\left(2016-1\right)+1}{2}.\left(1+2016\right)\)

\(=\dfrac{2016}{2}.2017\)

\(=1008.2017\)

\(=2023056\)

=> 1 + 2 + 3 + ... + 2015 + 2016 = 2023056

The serial number of the sequence is:

(2016 - 1) + 1 = 2016 (skull)

The sum of the ranges is:

(2016 + 1) x 2017 : 2 = 2033136

Apply a formula to calculate the total number , i have :

1 + 2 + 3 + .... + 2015 + 2016 = \(\dfrac{\left[\left(2016-1\right):1+1\right].\left(2016+1\right)}{2}=\dfrac{2016.2017}{2}=2033136\)

(2016−1)+12.(1+2016)

=20162.2017

=1008.2017

=2023056