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ariesvang Group TitleBest ResponseYou've already chosen the best response.0
howd yuu get 2^11  1 = 2047?
 2 years ago

simamura Group TitleBest ResponseYou've already chosen the best response.2
This is geometric progression with first member a1=1 and q=4, so sum is 1*(14^6)/(14)=1365
 2 years ago

FoolForMath Group TitleBest ResponseYou've already chosen the best response.0
In general, \[ \sum \limits_ {i=0} ^n 2^i = 2^{n+1}1\]
 2 years ago

simamura Group TitleBest ResponseYou've already chosen the best response.2
@FoolForMath this formula doesn't work here because there is no 8 (2^3) in sum
 2 years ago

sahil51993 Group TitleBest ResponseYou've already chosen the best response.1
Further taking simamura's solution 4^61=4^21(4^4+1+4^2) =15(273) divided by 3 ie 1365
 2 years ago

ariesvang Group TitleBest ResponseYou've already chosen the best response.0
thank you guys for the help i appreciate it
 2 years ago

FoolForMath Group TitleBest ResponseYou've already chosen the best response.0
OKay I can see it now, 1 + 4 + 16 + 64 + 256 + 1024. This is a geometric series with first term 1, and common difference 4.
 2 years ago

sheg Group TitleBest ResponseYou've already chosen the best response.0
\[\large{1^2+2^2+4^2+8^2+16^2+32^2}\] now you can solve
 2 years ago

Zarkon Group TitleBest ResponseYou've already chosen the best response.2
there are only 6 numbers...just add them
 2 years ago
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