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fogvajarash
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Homework Statement
a) Show that the curve determined by:
[itex]x=2(t^{3}+2)/3[/itex], [itex]y=2t^{2}[/itex], [itex]z=3t-2[/itex]
intersects the surface:
[itex]x^{2}+2y^{2}+3z^{2}=15[/itex]
at a right angle at the point (2, 2, 1)
b) Verify that the curve [itex]x^{2}-y^{2}+z^{2}=1[/itex], [itex]xy+xz=2[/itex] is tangent to the surface [itex]xyz-x^{2}-6y+6y=0[/itex] at the point (1, 1, 1)
Homework Equations
The Attempt at a Solution
I don't know where to start (they have given us this assignment without explaining completely all of the concepts). I was thinking of taking the gradient of the curve and the surface in a), but I'm not sure how to proceed from there (and the curve will have 3 components in the gradient vector, and the surface will only have 2 components because we have x, y ,z). Could someone guide me in the right direction? As well, is there a general method to solve this type of exercises?