Question

What is the sum of a 6-term geometric series if the first term is 19 and the last term is 319,333?

Answer 1

etermine the three cubic roots of 8.give the answer in the form of a+bj.also give the main root in the exponential form

Answer 2

dude that sounds so complex...

Answer 3

Ya cos cubic roots of 8 is 2.2.2 so wanna know how to solve it

Answer 4

the 6th term is 319333

you need to find r

so

\[319333 = 19\times r^{6 -1}\]

\[\frac{319333}{19} = r^5\]

then\[ r = \sqrt[5]{\frac{319333}{19}}\]

Once you know r

then use

\[S_{6} = \frac{19(r^6 -1)}{r -1}\]

that will give you the sum of the 6 terms