This can be a great way to check your work or to see How to solve summation notation in statistics.

The following formula means to sum up the weights of the four grapes: (1.11.1) ∑ i = 1 4 X i. The Greek letter capital sigma ( ∑) indicates summation. The i = 1 at the bottom

Evaluate an expression that includes summation notation. Apply summation notation to calculate statistics. This notation is called summation notation and appears as: In this notation, the is

Scan your problem

Clarify math equation

Track Improvement

Explain math questions

Explains summation notation and gives examples

Homework Support Online

The first step to solving any problem is to scan it and break it down into smaller pieces.

Mathematics Homework Assistant

If you're struggling with your homework, our Homework Help Solutions can help you get back on track.

Get arithmetic support online

One way to think about math equations is to think of them as a puzzle. Each piece of the equation fits together to create a complete picture. When one piece is missing, it can be difficult to see the whole picture.

m ∑ i=nai = an + an+1 + an+2 + + am−2 + am−1+ am ∑ i = n m a i = a n + a n + 1 + a n + 2 + + a m − 2 + a m − 1 + a m. The i i is called the index of summation. This notation

Get Started