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by monge.alejandro
Tue Dec 06, 2011 9:33 pm
 
Forum: General Math Questions
Topic: (3^-2)^-3
Replies: 1
Views: 901
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(3^-2)^-3

(3^-2)^-3

3^-6
3^-5
3^-1
3^5
3^6

I would think you need to start with parenthesis, so 3^-2=9, which is the same than 3^2; then you multiply by the -3, to equal 3^-6. I think I read too much into it.
by monge.alejandro
Tue Dec 06, 2011 10:18 pm
 
Forum: GMAT Official Practice Test Math
Topic: how many hardcover books did Juan buy?
Replies: 22
Views: 9769
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Re: how many hardcover books did Juan buy?

Please point out the flaw in my approach. I followed the MGMT inequalities rules in handling this question.. let the quantity of hardcover books be x Statement 1 25x is greater than or equal to 150 therefore x is greater than or equal to 6 Insufficient. Statement 2 8(GT10)+25x < 260 Therefore GT...