Question

Explicit: 3,9,27

Answer 1

\(3^1, 3^2, 3^3, ...\)

Answer 2

Formula

Answer 3

explicit geometric series are written in the form : \(a_n=a_{1}\times r^{n-1}\)where \(a_1\) is the first term, \(r\) is the ratio, and \(n\) is the term number.

here the first term, \(a_1=3\) and the ratio is also \(r=3\)
thus you would write: \(\large a_n=3(3)^{n-1}\)
**No, the 3's cannot be multiplied since the r, 3, is being raised to the n-1'th power**

Answer 4

Thanks

Answer 5

wow

Answer 6

Arithmetic sum :5,8,11,...29 ? Formula

Answer 7

http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html
have fun