a1=-1;an=-5an-1 please help prealgebra first five terms
Did you not look at my reply to your similar question here ???
https://www.jiskha.com/display.cgi?id=1509589034
Reiny i did look at your similar answer but i still dont understand please explain the step
To find the first five terms of the sequence for the given formula, you can use the recursive formula provided.
The recursive formula is given by:
a(1) = -1
a(n) = -5a(n-1)
The sequence starts with a(1) = -1. To find the second term, plug in n = 2 into the recursive formula:
a(2) = -5a(2-1)
= -5a(1)
= -5(-1)
= 5
So, the second term a(2) is 5.
To find the third term, plug in n = 3 into the recursive formula:
a(3) = -5a(3-1)
= -5a(2)
= -5(5)
= -25
The third term a(3) is -25.
Similarly, continue the process to find the remaining terms.
The fourth term:
a(4) = -5a(4-1)
= -5a(3)
= -5(-25)
= 125
The fourth term a(4) is 125.
The fifth term:
a(5) = -5a(5-1)
= -5a(4)
= -5(125)
= -625
The fifth term a(5) is -625.
So, the first five terms of the sequence, using the given recursive formula, are: -1, 5, -25, 125, -625.