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Manager
Joined: 04 Sep 2006
Posts: 113

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03 Feb 2009, 11:06
Q: In the xy plane is the curve y= -5x^2 +c below x- axis ?
1. c<0
2. the curve passes thru (-2,-22)

pls expn in detail

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Director
Joined: 29 Aug 2005
Posts: 808

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03 Feb 2009, 13:13
D?
Question can be rephrased as "is c<0?" as when c<0, y<0.
SVP
Joined: 07 Nov 2007
Posts: 1728
Location: New York

### Show Tags

03 Feb 2009, 21:28
vcbabu wrote:
Q: In the xy plane is the curve y= -5x^2 +c below x- axis ?
1. c<0
2. the curve passes thru (-2,-22)

pls expn in detail

Below x - axis mean y value must be -ve

1) c<0 --definitely y<0 .. curve is below x -axis

2) the curve passes thru (-2,-22)

pass through point y=-22 and x=-22
clearly below x-axis

D

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