Question

Find the sum of the infinite geometric series, if it exists.
4 - 1 + 1/4 - 1/16 + . . .

Answer 1

so r= -1/4 right

Answer 2

\(a=4,r=-\frac{1}{4}\) use
\[\frac{a}{1-r}\]

Answer 3

yes, \(r=-\frac{1}{4}\)

Answer 4

so the answer would be 16/5

Answer 5

thank you

Answer 6

\[\frac{4}{1+\frac{1}{4}}=\frac{4}{\frac{5}{4}}=\frac{16}{5}\] yes looks right