T TONYYEUNG New member Joined Aug 8, 2006 Messages 16 Aug 8, 2006 #1 Dear All, Please help me to answer the following question:- How many lines are tangential to both the curves y=4+x^2 and y=-4-x^2? At what points do these tangents meet these curves? Best Regards, Tony
Dear All, Please help me to answer the following question:- How many lines are tangential to both the curves y=4+x^2 and y=-4-x^2? At what points do these tangents meet these curves? Best Regards, Tony
pka Elite Member Joined Jan 29, 2005 Messages 11,978 Aug 8, 2006 #2 First graph both curves! Then look at \(\displaystyle y = \pm 4x.\) You will see the answer.
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,325 Aug 8, 2006 #3 Did you draw the graphs? Do you recognize the parabolas? Two?
T TONYYEUNG New member Joined Aug 8, 2006 Messages 16 Aug 8, 2006 #4 Thank you for your answer. But I still got some serious problem in the Calculus. Anyway, I will ask if I have got the problem. Thank you. Tony
Thank you for your answer. But I still got some serious problem in the Calculus. Anyway, I will ask if I have got the problem. Thank you. Tony
