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## Homework Statement

Find the slope of the tangent line to the curve of intersection of the vertical plane x-y+1= 0 and the surface z=x^2+ y^2 at the point (1, 2, 5) .

## Homework Equations

## The Attempt at a Solution

Normal Vector 1 is i-j

Normal Vector 2 is 2i+4j-k

Cross them to get i+j+6k

then turn that vector into a unit vector and after that I am unsure what to do