given a, b and c and the relationship of a^2 = x^2 + y^2 + xy b^2 = y^2 + z^2 + yz c^2 = z^2 + x^2 + zx express x, y, z in terms of a, b, c.... geometry: can you fit any triangle to a 3-axis coordinate (120 degree apart) with all three vertices on each axis? physical: given 3 phase line to line voltage can we recover the 3 phase line -to-neutral voltage if 3 phases are 120deg apart but not necessarily balanced?
【在 l***g 的大作中提到】 : given a, b and c and the relationship of : a^2 = x^2 + y^2 + xy : b^2 = y^2 + z^2 + yz : c^2 = z^2 + x^2 + zx : express x, y, z in terms of a, b, c.... : geometry: can you fit any triangle to a 3-axis coordinate (120 degree apart) : with all three vertices on each axis? : physical: given 3 phase line to line voltage can we recover the 3 phase line : -to-neutral voltage if 3 phases are 120deg apart but not necessarily : balanced?
yes. you can. The challenge here is you have to delivery your US dollar abroad, and move RMB back to China. This causes money and illegal if you dont have enough quota.