= ? ? ? ? Find and " ay? fx, y) = xy-x ? ax 2 ? ay? ? ? Evaluate them all at (1, -1) if possible. (If an answer is undefined, enter UNDEFINED.) ? (1, -1) = 2 at 2 (1, -1) = ay? ? |(1, -1) = a2f (1, -1) = Need Help? Read it MY NOTES ASK YOUR TEACHER and - ? ? ? ? Find x2' ?" f(x, y) = x+y - x ? 2 2f ? a2f ? Evaluate them all at (1, -1) if possible. (If an answer is undefin 2 ? 2(1, -1) = a2f 6(1, -1) 2 ? (1, -1) = ? -(1,1) Need Help? Read It