Mathematics · Multivariable Calculus
Let f = f(x, y). The point (a, b) is a saddle point when:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(fxx × fyy - fxy2) = 0
- 2(fxx × fyy - fxy2) > 0
- 3(fxx × fyy - fxy2) < 0✓
- 4(fxx × fyy - fxy) < 0
Correct answer
(fxx × fyy - fxy2) < 0
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