A*B=A2-B2-[2(A3-1)=-B分之1]除(A-B)求(-2)*(2分之一)的值
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
答
(-2)*(1/2)
=(-2)^2-(1/2)^2-{2×[(-2)^3-1+1/[-(1/2)]}÷(-2-1/2)
=4-1/4-[2×(-7)]÷(-5/2)
=4-1/4-28/5
=-37/20
答
(-2)*(1/2)=-1
答
(-2)*(1/2)
=2×(-2)-2×(1/2)-{2×[3×(-2)-1]}
=[-(1/2)]÷[(-2)-1/2]
=-1/2÷(-5/2)
=1/5