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# when 9-x^2>0, x^2-2x+8>0, what is x's range? A.

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Manager
Joined: 30 Mar 2007
Posts: 183
Followers: 1

Kudos [?]: 11 [0], given: 0

when 9-x^2>0, x^2-2x+8>0, what is x's range? A. [#permalink]  02 Jun 2007, 05:32
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when 9-x^2>0, x^2-2x+8>0, what is x's range?

A. (-3,-2)
B. (3,2)
C. (0,3)
D. (-3,0)
E. (0)
Intern
Joined: 04 Feb 2007
Posts: 39
Followers: 1

Kudos [?]: 0 [0], given: 0

9- x^2 >0 implies { -3 <x> +3 }

and

x^2-2x+8>0 is true for all x, x a real number

hence Range of x : ( -3, 3 )
Director
Joined: 13 Mar 2007
Posts: 545
Schools: MIT Sloan
Followers: 4

Kudos [?]: 28 [0], given: 0

concur with Vidya,

are the answer choices/question right ?
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