下面就是
GRE数学真题和解析(22)
27If 1 is expressed as a terminating decimal, how many nonzero digits 1/[(211)(517)] will the decimal have?
A One
B Two
C Four
D Six
E Eleven
将分子转化下,使之成为以10为底数的指数,由此可以判断小数点的位数了,(211)(517 )=1011*56=(1/64)*1017,由此可知,倒过来后,非零数位有两位,6和4.
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