if you use the formula Sn= n/2(a1+an) you can find the answer.
Plug it in like this S190= 190/2(1+190)
which comes out to be 18145
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The sum of the first 20 integers is 190.
The sum of the first seven positive INTEGERS is 28. The sum of the fisrt seven positive numbers is infinitesimally small.
105625
They total 650. * * * * * It is 2550.
It is 40*41/2 = 820