Answer to Question #46340 in Vector Calculus for pallavi

Question

For the vectors □(□(→┬a )) =xyz□(→┬i )-2xz^2 □(→┬j )+xz□(→┬k ) and □(→┬b )=2z□(→┬i )+y□(→┬j )-x□(→┬k)
Find ∂^2/∂x∂y (□(→┬a )×□(→┬b )) at (2,0,-1)