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I don't know exactly what type of formula you are looking for..... But, if you let n = # of term.... then the rule would be 3^(n - 1)

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Q: Math rule for 1 3 9 27 81?
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Related questions

What are the factors of 81 in math?

The answer is 1,3,9,27,81. 81*1=81 3*27=81 9*9=81 27*3=81 81*1=81


What comes after 1 3 9 27 in Math?

81. Each number is the previous number times three. 3 x 27 = 81.


What are the factor of 81 and 27?

81= 1, 2,9, and 81 27= 1, 3,9, and 27


What the greatest common factor of 81 and 27?

Factors of 81: 1, 3, 9, 27, 81 Factors of 27: 1, 3, 9, 27 GCF (81, 27) = 27


Factor of 81?

1, 3, 9, 27, 81. 1 x 81 = 81, 3 x 27 = 81, 9 x 9 = 81.


What is the rule for 1 3 9 27 81?

Multiply each term by 3 to get the next one.


What is 27 over 81 simplest form?

1/3 or one third 27/81 divide both by 27 27/27 = 1 27/81 = 3 Answer: 1/3


The composite factors of 27 and 81?

1, 3, 9, 27 1, 3, 9, 27, 81 9, 27 and 81 are composite.


What is a prime factor for 81?

The multiples of 81 are infinite. The factors of 81 are: 1, 3, 9, 27, 81.


What are factors of 81 and27?

The factors of 27 are: 1, 3, 9, 27 The factors of 81 are: 1, 3, 9, 27, 81


What are the factors for 81 and 27?

The factors of 27 are: 1, 3, 9, 27The factors of 81 are: 1, 3, 9, 27, 81


What factors goes into 81?

1, 3, 9, 27, 81