2. Let f be a homogeneous function of degree n 2 1, that is, f(tx, ty) = to f(x, y) for any t E R. Suppose all second order partial derivatives exist and continuous, show that of of = nfl Ox + yay 3. The length and width of a rectangle are measured as 30 cm and 24 cm, respectively, with an error in measurement of at. most. 0.1 cm in each. Use differentials to estimate the maximum 1:1 0 147%- - /1 H 12:0 Q S 2021/