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anonymous
 one year ago
check my answer?
Find S_11 for 1 + 2 + 4 + 8 + ...
I got 2047, is that correct?
anonymous
 one year ago
check my answer? Find S_11 for 1 + 2 + 4 + 8 + ... I got 2047, is that correct?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I believe that it means the sum of the series

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0idk the answer to this

sloppycanada
 one year ago
Best ResponseYou've already chosen the best response.1Write out your equation for me.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well I know that r=2 and so I multiplied by 2 for each and got 1,2,4,8,16,32,64,128,256,512,1024 and then I looked it up because I wasn't sure what to do next and they got 2047 and I wanted to know how they got that

sloppycanada
 one year ago
Best ResponseYou've already chosen the best response.1There is an equation. First you have to find the t11. T11 = term 11.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The eleventh term is 1024 I believe

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its geometric progression, a, ar, ar^2, ar^3.... the common ratio here is 2, that is, every next term is "previous term multiplied by 2" sum in a GP is given by the formula \[ \frac{ a (1r ^{n})}{ 1r }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0take a as 1, r as 2 and n as 11

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(1(12^11))/12 =12048/12 =2047

sloppycanada
 one year ago
Best ResponseYou've already chosen the best response.1So yes, your answer is 2047
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