求证:0.99999等于1
问题描述:
求证:0.99999等于1
答
令0.999…=x 则9.999…=10x 9+0.999…=10x 9+x=10x 9x=9 x=1 即0.999…=1
求证:0.99999等于1
令0.999…=x 则9.999…=10x 9+0.999…=10x 9+x=10x 9x=9 x=1 即0.999…=1