Question

Evaluate the following geometric sum.
1/3 + 1/6 + 1/12 + 1/24 + ..... + 1/192

Answer 1

i messed that up - method was right but i miscalculated

Answer 2

the correct answer in 127/192

Answer 3

sum = (1/3) * 1 - r^n
------
1 - r
= (1/3) * 1 - (1/2)^7
---------
1 - r
= (1/3) * (1 - 1/128)
----------
(1/2)

= 127 * 2 127
------ = --- = 127/192
128 * 3 64 * 3

Answer 4

i did the same thing but i kept getting the wrong answer
i think it's cause i put in my calculator the wrong way

Answer 5

Thanks man

Answer 6

no probs