Question

Find the sum of the geometric sequence.

1, 1/4, 1/16, 1/64, 1/256

Answer 1

\[a \left( \frac{ 1-r ^{n} }{ 1-r } \right)\]
a - first term in series
r - common factor between sequence progression (in this case what each number decreases by)
n - number of terms you want to add up

Answer 2

@nikato would i solve this like the last one?

Answer 3

yes. but use that formula^ becuz its geometric. and instead of finding the common difference, u find the common ratio

Answer 4

How do you find that

Answer 5

What does each number decrease by constantly if you multiply by what do you get the next term.

Answer 6

divide one of the term by the previous one

Answer 7

i got 1/4