Evaluate the sum.
Use linearity of the summation to expand .
A. B. C. D.
In order to use the formulas, the index, j, must begin at j = 1.
Rewrite and
with j starting at j = 1.
Substitute appropriately from step 2 to write the summation with index j =1. Round your answer to three decimal places.
Recall the formulas and
.
Using these formulas, evaluate . Round your answer to three decimal places.