In the sequence 2,6,18,..., which term is number 162?

162 = 2 x 3^(n -1)

is this how you start it?

then i get 81 = 3^(n-1)

how do i solve that without using a calculator?

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- Dec 7th 2008, 06:11 PMNeedHelp18Need Help with simple geometric sequence
In the sequence 2,6,18,..., which term is number 162?

162 = 2 x 3^(n -1)

is this how you start it?

then i get 81 = 3^(n-1)

how do i solve that without using a calculator? - Dec 7th 2008, 06:26 PMSkalkaz
simply try to find out:

3^1 = 3 < 81

3^2 = 9 < 81

3^3 = 27 < 81

etc. - Dec 7th 2008, 06:30 PMeuclid2