E elv09 Member Joined May 2, 2009 Messages 44 Gender Male HSC 2009 May 2, 2009 #1 find the locus of a point which satisfies |z-3| + |z+3| = 8 cheers
L lolokay Active Member Joined Mar 21, 2008 Messages 1,015 Gender Undisclosed HSC 2009 May 2, 2009 #2 needs some conics knowledge an ellipse w/ foci (-3,0), (3,0) since for an ellipse, the sum of the distances from a point on the ellipse to the two foci is a constant and 2a = 8, a=4 so b = rt(7) x2/16 + y2/7 = 1 Last edited: May 2, 2009
needs some conics knowledge an ellipse w/ foci (-3,0), (3,0) since for an ellipse, the sum of the distances from a point on the ellipse to the two foci is a constant and 2a = 8, a=4 so b = rt(7) x2/16 + y2/7 = 1
