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# What is the rule for the nth term of the sequence -12 -5?

Updated: 9/25/2023

Wiki User

9y ago

-7

Seamus Friesen

Lvl 10
3y ago

Wiki User

9y ago

It's not possible to identify the sequence from only two terms.

It could be T(n) = 7n - 19 .

It could be T(n) = (-144/5) x (5/12)^n .

There are many other things it could be.

Wiki User

9y ago

There are infinitely many polynomials of order 2 (quadratics) that will give these as the first two numbers and any one of these could be "the" rule. Short of reading the mind of the person who posed the question, there is no way of determining which of the infinitely many solutions is the "correct" one.It is not even possible to tell whether the sequence is arithmetic (additive) or geometric (multiplicative). There is simply not enough information.Any one of -n^2 + 10n - 21, -0.5n^2 + 8.5n - 20, 7n - 19, 0.5n^2 + 5.5n - 18, will do.

Wiki User

9y ago

Given that your sequence could be linear or curved; for we do not have sufficient terms; there are a large number of solutions to the question.