(1 point) Use the contour diagram of f to decide if the specified directional de

Question

(1 point) Use the contour diagram of f to decide if the specified directional derivative is positive, negative, or approximately zero 2.4 1.6 ? 5 1 . At the point (0,-2) in the direction of (2-2/ 2. At the point (0, 2) in the direction of j, 3. At the point (-2, 2) in the direction of i, ? 0.8 1.6 4. At the point (-1, 1) in the direction of (-i -j)/V2 ? 5. At the point (1,0) in the direction of 6. At the point (-1,1) in the direction of (-i +j)/v2, 2.41.6 0.8 0.8 1.6 2.4 (Click graph to enlarge)

Explanation / Answer

1. At the point (0,?2) in the direction of (i?2j)/?5 = (positive)

2. At the point (0,2) in the direction of j = (positive)?

3. At the point (?2,2) in the direction of i = (negative)?

4. At the point (?1,1) in the direction of (?i-j)/?2 = (zero)?

5. At the point (1,0) in the direction of ?j = (zero)?

6. At the point (?1,1) in the direction of (?i+j)/?2 = (positive)?

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