Question

Will fan and medal!
-3, 6, -9, 12, -15, . . .

Which of the following represents the general term for the sequence given?

Answer 1

(-1)^n3^n
(-1)^n3n
(-1)^(n+1)3

Answer 2

test formulas
by put n=1 , 2, 3

Answer 3

if you look at positive of them
you will find soon what they are

Answer 4

(-1)^1*3^1=-3 (-1)^2*3^2=9 not it
(-1)^1*3(1)=-3 (-1)^2*6=6 (-1)^3*3^3=-9 <-- correct
(-1)^2*3=3 not it

Okay i got it i think