Find non-negative x,yx,yx,y with x+y=16x + y = 16x+y=16 minimising x3+y3x^3 + y^3x3+y3.
x=y=8x=y=8x=y=8
x=15,y=1x=15,y=1x=15,y=1
x=12,y=4x=12,y=4x=12,y=4
None.
