已知x,y是实数,向量a,b不共线,若(x+y-1)a+(x-y)b=0,则x=?y=?如题
问题描述:
已知x,y是实数,向量a,b不共线,若(x+y-1)a+(x-y)b=0,则x=?y=?
如题
答
已知x,y是实数,向量a,b不共线,
又(x+y-1)a+(x-y)b=0.
∴ x+y-1=0
x-y=0
∴x=1/2,y=1/2.