Math Chapter Wise question with answer

Q01 Find the directional derivation of Du f(x, y) at the point (x, y) = (1, 2), where f (x, y) = x3 – 3xy + 4y2 and u i... English · JSSC PGT 2018 Q02 The function f(x,y) may have a maximum or minimum at a point, if at that point: English · UP PCS (Pre) 1997 Q03 If A = fxx (a, b), B = fxy (a, b) and C = fyy (a, b), then the function f(x, y) will have a maximum at the point (a... English · NVS PGT 10-06-2019 Q04 If 2 xy z = e,x = tcost,y = tsint, then the value of dz π at,t = is - dt 2 English · UPPSC Polytechnic Lecturer 2021 (I) Q05 If u = () 2 2 2 3 3 2 2 x (x – y) x + y, the value of ∂ ∂ ∂ u u x + y y x is English · UPPSC Ashram Paddhati 2021 Q06 If u is a homogeneous function of x and y of degree n, the value of ∂ ∂ ∂ ∂ ∂ 2 2 2 2 2 u u u x + 2xy + y x y is English · UPPSC Ashram Paddhati 2021