Question

a₁=4, r = -2
aⁿ=_ () n-1

Answer 1

what is ur question exactly??
an is not clear..

Answer 2

thats it that is the problem

Answer 3

what u mean that an=_() n-1 ???

Answer 4

just the first line is the equation
the second line is to be filled in with the answer

Answer 5

an=4(-2)^(n-1)

Answer 6

thanks i couldn't figure it out at all

Answer 7

this is a GP series representation..a1 is the first term and -2 common ratio

Answer 8

ok wow im sweating here :)

Answer 9

why?? don't u know GP

Answer 10

no wat is it

Answer 11

http://en.wikipedia.org/wiki/Geometric_progression

Answer 12

reading it now thanks a bunch