1-2分之1-4分之1-8分之···256分之1

4个回答

1-1/2-1/4-1/8-...-1/256
=1-(1-1/2)-(1/2-1/4)-(1/4-1/8)-...-(1/128-1/256)
=1-1+1/2-1/2+1/4-1/4+1/8-.-1/128+1/256
=1/256