规定新运算a*b=5a+2b-1则2*5-1
问题描述:
规定新运算a*b=5a+2b-1则2*5-1
答
2*5-1
=5x2+2x5-1-1
=10+10-1-1
=18
规定新运算a*b=5a+2b-1则2*5-1
2*5-1
=5x2+2x5-1-1
=10+10-1-1
=18