(Ⅰ)∵csinC-asinA=b(sinB-sinA),∴c2-a2=b2-ab,∴cosC= a2+b2?c2 2ab = 1 2 ,①∴C= π 3 ,∴S△ABC= 1 2 absinC= 3 4 ab= 2 3 3 ,∴ab= 8 3 ,②联立①②整理得9a4-60a2+64=0,求得a= 2 3 3 ,b= 4 3 3 或a= 4 3 3 ,b=2