What is 2^i multiplied by this symbol ∑ , with a 3 on top of it and a 1 on the bottom of it?

Question

3
∑(2^i)=???? Thats more what the problem looks like.
1
any suggestions on a better way to phrase this question or type it in on google would be appreciated..Thanks
1

Answer 1

This is not a multiplication, but an addition.

You plug the values between 1 and 3, and you get this:

2^1 + 2^2 + 2^3 = 2 + 4 + 8 = 14

∑ is a Greek letter, the sigma, and its used as the initian of "sum"

Ana

Answer 2

I think I can follow what you're saying... it's the summation for i = 1 to 3 of 2^i. In other words, 2 + 4 + 8 = 14

Answer 3

That capital greek letter sigma is for summation. The index, i, starts at 1 and goes in steps of 1 up to 3

That means:

2^1 + 2^2 + 2^3

Every value of i represents one term in the summation.

Answer 4

Ok it just means that you substitute all the values between the top and bottom value for i , and add up the results.