Suppose that f(x,y) = xy. Find the directional derivative of f(x,y) in the directional 〈-3, -4⌡ and at the point (x,y) = (5, -1). Answer exactly or round to 2 decimal places.
TIP
Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
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Suppose that f(x,y) = x^3y^2. Find the directional derivative of f(x,y) in the directional 〈1, -1⌡ and at the point (x,y) = (3, -3). Answer exactly or round to 2 decimal places.
TIP
Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Get Help: VIDEO