
Level curves Let f(x, y) = 8 – 2x2 – y2. For the following level curves f(x, y) = C and points (a, b), compute the slope of the line tangent to the level curve at (a, b) and verify that the tangent line is orthogonal to the gradient at that point.
68. f(x, y) = 5; (a, b) = (1, 1)

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Chapter 15 Solutions
Calculus: Early Transcendentals and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition) (Briggs, Cochran, Gillett & Schulz, Calculus Series)
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