use the summation formulas to rewrite the expression without the summation notation. Use the result to find the sum for n=100.

Question

n

∑     4i+3/n²

i=1    

Answer 1

Summation of n terms (from i=1 to n) of the expression 4i+3 = 4[n(n+1)/2] + 3n...you can simplify.

 

What is the n squared doing there?  If it's intended to be a denominator, it can be factored out since it's not changing, only i changes during the summation.