Question

Find the sum of this infinite geometric series.
8+4+2+...

Answer 1

\[Sum = \frac{ a }{ 1-r }\]

Answer 2

\[r=\frac{ t2 }{ t1} = \frac{ 4 }{ 8 } = \frac{ 1 }{ 2 }\]

\[a=8\]

Hope this helps

Answer 3

thx

Answer 4

\[S=\frac{ 8 }{ 1-\frac{ 1 }{ 2 } } = \frac{ 8 }{ 0.5 } = 16\]