# calculus

posted by
**Bob** on
.

f(x,y)=x^2+2y^2

use the gradient vector Þf(5, 1) to find the tangent line to the level curve f(x, y) = 27 at the point (5, 1).

answer choices:

1. 10x + 4y = 27

2. 2x + 4y = 27

3. 5x + 2y = 27

4. 10x − 4y = 27

5. 5x − 2y = 27