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coordinate

by arocks » Mon Oct 15, 2007 1:31 am
Q1. Does Y=mX^2+h intersect with axis-x?

1). m<0
2). h>0

OA - C

Q2. Y=a(x-b)^2+P. Can you tell if y intersects with x axis?
1). a<0
2). P>0

OA - C

I guess both the questions use the same approach. Pls explain. Thanks.
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by samirpandeyit62 » Mon Oct 15, 2007 2:54 am
Q1. Does Y=mX^2+h intersect with axis-x?

1). m<0
2). h>0

at x axis y=0
hence mx^2 + h = 0

x= sqrt (-h/m)

now here for x to be a real nos & imaginary -h/m should be positive
which will be the case only if combine both stmst.
Regards
Samir
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