Question

HELP!!
Determine and state if the sequence below is Arithmetic or Geometric. Then find the value of the term.
4,-8, 16, -32...
Find a10

Answer 1

-8-4=-12,16-(-8)=24
So it is not arithmetic
\[\frac{ -8 }{ 4 }=-2,\frac{ 16 }{ -8 }=-2\] so c.r. is same
calculate a10

Answer 2

okay so what is A10?

Answer 3

\[a_{n}=ar ^{n-1}\]
a=4
r=-2
n=10
find \[a _{10}\]