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Mathematics 9 Online
OpenStudy (anonymous):

Find the sum. 1 + 4 + 16 + · · · + 16,384 can someone help ?

OpenStudy (amistre64):

n=[0,?]; [E]4^n ??

OpenStudy (amistre64):

4^0 + 4^1 + 4^2 + 4^3 + 4^4 .....etc right?

OpenStudy (anonymous):

right

OpenStudy (amistre64):

4^7 is the tops

OpenStudy (amistre64):

we can put it in 7 times in the googl bar to get a sum... but other than that im clueless..

OpenStudy (anonymous):

Ok Thanks

OpenStudy (amistre64):

(4^0) + (4^1) + (4^2) + (4^3) + (4^4) + (4^5) + (4^6) + (4^7) = 21 845

OpenStudy (amistre64):

there is prolly a fancier way to do that, but i cant recall it :)

OpenStudy (anonymous):

so the answer would be 21/845?

OpenStudy (amistre64):

21,845

OpenStudy (anonymous):

Oh ok thanks for your help!

OpenStudy (amistre64):

\[\sum_{n=0}^{7}4^n\]

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