Use the level curves of the function z = = f(x, y) to determine if each partial derivative at the point P is positive, negative, or zero. ? ? ? ? ? 1. fxx (P) 2. fyx (P) + 3. fyy (P) ◆ 4. fx (P) 5. fy (P) 2.8 2.4 1.6 1.2 0.8 0.4 o 0 0.4 high med low 0.8 1.2 .Р 1.6 2 2.4 2.8 (Click on graph to enlarge)

Q: 3 11. f(x) = Vx-6Vx 12. f(t) = t3 -t3 +4 ww-

A: Basic derivative formula can be used to solve the questions. ddx(xn)=nxn-1ddx(cosx)=-sinx

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Q: se the graph of the function below to establish the sign of its second derivative

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