单项选择题
5,10,26,50,122,( )A.143B.156C.168D.170
单项选择题5,10,26,50,122,( )
4,5,14,33,80,( )A.146B.193C.212D.225
单项选择题4,5,14,33,80,( )
若A※B=2(A+B),A◎B=(A+B)(A-B),则(7※8)◎9的值为( )A.78B.256C...
单项选择题若A※B=2(A+B),A◎B=(A+B)(A-B),则(7※8)◎9的值为( )