# Let f(x,y) = (x-y)/(x+y). Find the directions u and the values of Duf(-1/2,3/2) for which Duf(-1/2,3/2) IS Smallest…

##### Home/Education/Expert Q&A/Let f(x,y) = (x-y)/(x+y). Find the directions u and the values of Duf(-1/2,3/2) for which Duf(-1/2,3/2) IS Smallest…

**Question:**

Let f(x,y) = (x-y)/(x+y). Find the directions u and the values of Duf(-1/2,3/2) for which

Duf(-1/2,3/2) IS Smallest

Duf(-1/2,3/2) =0

Duf(-1/2,3/2) =-2

Duf(-1/2,3/2) =1

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