☆表示一种新的运算符号,并且规定a☆b =(a +b)/(a-b),那么(72☆56)☆6 =(

问题描述:

☆表示一种新的运算符号,并且规定a☆b =(a +b)/(a-b),那么(72☆56)☆6 =(
☆表示一种新的运算符号,并且规定a☆b =(a +b)/(a-b),那么(72☆56)☆6 =( )后面挂号里应该填什么数,

(72☆56)☆6
=[(72+56)/(72-56)]☆6
=8☆6
=(8+6)/(8-6)
=14/2
=7