问题:
对有理数x,y定义运算*,使x*y=ax y+b+1,若1*2=869,2*3=883,则2*9的值为
A.1888
B.1889
C.1890
D.1891
对有理数x,y定义运算*,使x*y=ax y+b+1,若1*2=869,2*3=883,则2*9的值为
A.1888
B.1889
C.1890
D.1891
A.1888
B.1889
C.1890
D.1891
参考答案: