Question

Can someone please help me with this problem....
Evaluate the summation

Answer 1

\[\sum_{i=0}^{3}3^i\]

Answer 2

1) There are only four terms. Just add them up.
2) It's geometric. There are ways to add up such things.

How shall we proceed?

Answer 3

1 I gues I am really confused

Answer 4

would the answer be 4

Answer 5

Do you understand the notation? The expression \(3^{i}\) is to be evaluated for the values i = 0, i = 1, i = 2, and i = 3.

Answer 6

If the top number were "1", the correct answer would be 4.

Answer 7

ok

Answer 8

ok so then how so I find the answer

Answer 9

@tkhunny can you help me please

Answer 10

Substitute the four values.

\(3^{0} + 3^{1} + 3^{2} + 3^{3}\)

That's it.

This is a VERY useful notation, but this is not an example of how useful it is. We're just trying to get used to it.