3. Let f(x,y) = x + e". Find the directional derivative of f(x,y) at the point (1,1) in the direction of the vector i + 2j (a) i+2ej (c) (d) 1+ 2e lt 1+2e
Show transcribed image text3. Let f(x,y) = x + e". Find the directional derivative of f(x,y) at the point (1,1) in the direction of the vector i + 2j (a) i+2ej (c) (d) 1+ 2e lt 1+2e