(-2)^0+(-1)^2000-(1/2)^-1怎么做?
问题描述：
(-2)^0+(-1)^2000-(1/2)^-1怎么做?
另外还有x^+4/x-2+4x/2-x x^2+4/x-2+4x/2-x x/x-1-1=3/x+2 2/x^2-4-1/x+2=0
x^+4/x-2+4x/2-x应该是x^2+4/x-2+4x/2-x，
答
(-2)^0+(-1)^2000-(1/2)^-1
=1+1-2
=0
x^2+4/x-2+4x/2-x
=2x^3+8-4x+4x^2-2x^2
=2x^3+2x^2-4x+8x/x-1-1=3/x+2 1-1-1=3/x+2-1=3/x+2-x=3+2x-3=3xx=-12/x^2-4-1/x+2=02-4x^2-x+2x^2=02x^2+x-2=0