Question

Rewrite the sequence so that it represents a series instead of a sequence

3,9,27,81

Answer 1

HELPPP

Answer 2

Not sure if this is what you want, but those are powers of 3, so...
\[\sum_{i=1}^{n}3^n\]

Answer 3

how do you get that

Answer 4

The first term is 3^1, the second one 3^2, the third one is 3^3, and so on. But a series is a sum of terms, whereas a sequence is made out of separate terms, so in order to make that a series you have to write \[3^1+3^2+3^3+...\] which is represented by \[\sum_{i=1}^{n}3^n\]