O If fæz >0 and fyy <0 at a point (x, y) then (x, y) is a saddle point of f. If faa >0 and fyy> 0 at a point(r, y) then the point (x, y) is a local minimum of the function f. O If f(x, y) -L as (x, y) → (a, b) along every straight line through (a, b), then lim (2,v) (a,b) f(x, y) = L %3D

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Q: SOLVE BY LINEAR METHOD - y'- 3 X Y = x 3 cos (x)

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A: Let's find.

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.