The recursive formula of an arithmetic sequence is described below. a1= 19, an = An-1 + 6
Which represents the explicit equation of this arithmetic sequence?

A: an= 6n + 13
B: an= 13n + 6
C: an= 19n + 6
D: an= 6n + 19

it's C

Step-by-step explanation:

I am sure it's correct answer

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

bull

step-by-step explanation: