2+2+2^2+2^3+2^4+2^5+2^6+2^7+2^8= : PS Archive
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# 2+2+2^2+2^3+2^4+2^5+2^6+2^7+2^8=

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30 Apr 2006, 06:48
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2+2+2^2+2^3+2^4+2^5+2^6+2^7+2^8=?
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GMAT by 8th JUL

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01 May 2006, 02:46
1+( 1+2+2^2+...+2^8) = 1 + (2^9-1)/(2-1) = 512
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-al

01 May 2006, 02:46
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