Sequence
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Source: Beat The GMAT — Data Sufficiency |
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praky_rules
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1 Xi=Xi-1 /2 does nt tell you what X1 is
2.X5=X4/(X4+1) - I hope I am reading this right...No good stand alone.
combining the two...X5=X4/2 so X4=0 or 1..but all Xi are positive numbers...so X4 = 1 and so X1 is known
C
2.X5=X4/(X4+1) - I hope I am reading this right...No good stand alone.
combining the two...X5=X4/2 so X4=0 or 1..but all Xi are positive numbers...so X4 = 1 and so X1 is known
C


















