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# ds: equalities

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11 Apr 2004, 17:06
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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.
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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

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12 Apr 2004, 05:24
AGree B......from Stem 2........K=4!!
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12 Apr 2004, 21:00
halle...can you expansiate and simplify the factorization of your step 2 ?

Thanks........
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21 May 2004, 07:39
mirhaque, do you have an answer for this?
21 May 2004, 07:39
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