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Senior Manager
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ds: equalities [#permalink] New post 11 Apr 2004, 17:06
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A
B
C
D
E

Difficulty:

(N/A)

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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
ans & explain:

Is 5^k less than 1000?

1. 5^k+1>3000
2. 5^(k-1)=5^k-500

Last edited by mirhaque on 11 Apr 2004, 18:45, edited 1 time in total.
Senior Manager
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Re: ds: equalities [#permalink] New post 11 Apr 2004, 17:16
mirhaque wrote:
ans & explain:

Is 5^k less than 1000?

1. 5^k+1>3000
2. 5^k-1=5^k-500


1. 5^k > 600 insufficient
2. 500 = (1-(1/5)5^k
5^k = 625 sufficient

Answer is B
Senior Manager
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 [#permalink] New post 12 Apr 2004, 05:24
AGree B......from Stem 2........K=4!!
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 [#permalink] New post 12 Apr 2004, 21:00
halle...can you expansiate and simplify the factorization of your step 2 ?

Thanks........
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 [#permalink] New post 21 May 2004, 07:39
mirhaque, do you have an answer for this?
  [#permalink] 21 May 2004, 07:39
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