Question: please help me with this 9.1 ) Determine for function f (x, y) = cos(:1:2 + y2)determine the Taylor expansion up to degree 2 at
please help me with this

9.1 ) Determine for function f (x, y) = cos(:1:2 + y2)determine the Taylor expansion up to degree 2 at point (0, 1). 9.2 In which direction does the directional deriVatiVe of the function f (x, y) = 111(:E2 + .112) at point_ (x/Z \\/6) the Value 0? 9.3 Find the points on the Ellipsoid 5x2+5y2 +322 =4, haVB maximum or minimum distance to the origin
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