a※b=(a分之1-b分之1)+ab
-2※3=(-1/2-1/3)+(-2x3)
=-5/6-6
=-41/6
[1※(-2)]※4分步求
1※(-2)
=(1+1/2)+(-2)
=-1/2
[1※(-2)]※4=(-1/2)※4
=(-2-1/4)+(4*-1/2)
=-9/4-2
=-17/4
a※b=(a分之1-b分之1)+ab
-2※3=(-1/2-1/3)+(-2x3)
=-5/6-6
=-41/6
[1※(-2)]※4分步求
1※(-2)
=(1+1/2)+(-2)
=-1/2
[1※(-2)]※4=(-1/2)※4
=(-2-1/4)+(4*-1/2)
=-9/4-2
=-17/4