Question

Find the sum of the geometric sequence.

three divided by two, three divided by eight, three divided by thirty two, three divided by one hundred and twenty eight, three divided by five hundred and twelve

one divided by two hundred and fifty six
one divided by sixteen
one thousand twenty three divided by five hundred and twelve
341

Answer 1

we got a formula for it?

Answer 2

and why write it out in words ... this is math after all , we have updated to numeric representations in the last couple of centuries.

Answer 3

I copied it from the webpage and didn't realize it copied over like that .

Answer 4

for n terms, and a common ratio, r, ... begining at a_1

the sum of the terms of a geo seq is defined as:
\[S=a_1\frac{1-r^n}{1-r}\]

Answer 5

so, how many terms we got? whats the first one? and what our common ratio?

Answer 6

i really dont know

Answer 7

umm ...

how many terms is just a matter of counting
the first one is just a matter of picking the first one

the common ratio is about the trickiest one but its pretty simple nonetheless

Answer 8

if we know the first 2 terms

the common ratio is such that

a1 r = a2, therefore r = a2/a1

Answer 9

sorry....
5 terms

Answer 10

not sure about you, but the site flickered on my end ...