- #1

jcook735

- 33

- 0

**gradient vectors and tangent lines!**

If f(x, y) = xy, find the gradient vector f(3, 7) and use it to find the tangent line to the level curve f(x, y) = 21 at the point (3, 7).

I already found the gradient vector to be <7, 3>, Maybe I am missing something obvious, but I have no clue how to find the tangent line.