SOLUTION: The sum of the first n whole numbers is given by the expression 1⁄2(n2+n) Expand the equation by multiplying, then find the sum of the first 12 whole numbers.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The sum of the first n whole numbers is given by the expression 1⁄2(n2+n) Expand the equation by multiplying, then find the sum of the first 12 whole numbers.      Log On


   

Question 1176622: The sum of the first n whole numbers is given by the expression 1⁄2(n2+n)
Expand the equation by multiplying, then find the sum of the first 12 whole numbers.
Answer by ikleyn(52791) About Me  (Show Source):
You can put this solution on YOUR website!
.

    %281%2F2%29%28n%5E2+%2B+n%29 = %28n%2A%28n%2B1%29%29%2F2.


At n = 12, the sum is  %2812%2A13%29%2F2 = 6*13 = 78.

Solved.