a) A(x,y) = 2017 - ( 11y - 7 )^2 - ( x - 100 )^2
b) B(x,y) = 16 - ( x + y + 2 )^2 - ( y^2 - 9 )^2
c) N(x,y,z) = 15/ ( 2x - 4 )^2 + ( y + 3 )^2 + 10 + 5/ ( 4z - 2016 )^2 +2
Loga
Sinh Học lớp 12
