Question

find the first, fourth and eighth terms of the sequence. A(n)=-5 x 2^n-1. HELP PLEASE

Answer 1

-10;-80; -1280? -5; -40 ; -640? or anything else?

Answer 2

i swear i did this problem earlier today

Answer 3

something similar :P

Answer 4

no it was this one exactly

Answer 5

hrmmm u sure? i probably never got the answer quite right. lol

Answer 6

put \(n=1\) get
\[-5\times 2^{1-1}=-5\times 2^0=-5\] for the first one

Answer 7

second one is
\[-5\times 2^{4-1}=-5\times 2^3=-5\times 8=-40\]

Answer 8

ur an awesome man. Thank you.

Answer 9

yw