A*B=A2-B2-[2(A3-1)=-B分之1]除(A-B)

问题描述:

A*B=A2-B2-[2(A3-1)=-B分之1]除(A-B)
求(-2)*(2分之一)的值

(-2)*(1/2)
=2×(-2)-2×(1/2)-{2×[3×(-2)-1]}
=[-(1/2)]÷[(-2)-1/2]
=-1/2÷(-5/2)
=1/5