What is the term to term rule for the sequence 4,12,36,108,324

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2015-11-07 19:45:19

seems to be a geometric sequence each term is 3 times the previus [latex]a_n=a_1(r)^{n-1}[/latex] [latex]a_n[/latex] is the nth term [latex]a_1[/latex] is the first term r is the comon ratio n=which term so first term is 4 and the common ratio is 3 so [latex]a_n=4(3)^{n-1}[/latex] so the formula is [latex]a_n=4(3)^{n-1}[/latex] or in other notation [latex]f(n)=4(3)^{n-1}[/latex]

2015-11-07 19:46:34

a(n) = a(n-1)*3 There is a common ratio of 3 among the terms.

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