- #1

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## Homework Statement

find eqn of tangent plane to surface S at point P(2,1,3)

the curves

r = (2+3t, 1-t

^{2}, 3-4t+t

^{2})

r = (1+u

^{2},2u

^{3}-1 , 2u+1)

both lie on S.

## The Attempt at a Solution

i don't really know how to start. am i suppose to find eqn of S first? then use the formula

n.(r - P) with the partial differientials f

_{x}, f

_{y}etc?

but how do ifind S? with those 2 curves? thanks!