问道sat数学~In the decimal represention of 1\k,where 0< 1\k < 1 .the tenths digit is 1,the hundredths digit is 3,and at least one other digit is nonzero.what is the tenths digit in the decimal representation of k-1\k?这题怎么算?
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![问道sat数学~In the decimal represention of 1\k,where 0< 1\k < 1 .the tenths digit is 1,the hundredths digit is 3,and at least one other digit is nonzero.what is the tenths digit in the decimal representation of k-1\k?这题怎么算?](/uploads/image/z/8253878-14-8.jpg?t=%E9%97%AE%E9%81%93sat%E6%95%B0%E5%AD%A6%7EIn+the+decimal+represention+of+1%5Ck%2Cwhere+0%3C+1%5Ck+%3C+1+.the+tenths+digit+is+1%2Cthe+hundredths+digit+is+3%2Cand+at+least+one+other+digit+is+nonzero.what+is+the+tenths+digit+in+the+decimal+representation+of+k-1%5Ck%3F%E8%BF%99%E9%A2%98%E6%80%8E%E4%B9%88%E7%AE%97%3F)
问道sat数学~In the decimal represention of 1\k,where 0< 1\k < 1 .the tenths digit is 1,the hundredths digit is 3,and at least one other digit is nonzero.what is the tenths digit in the decimal representation of k-1\k?这题怎么算?
问道sat数学~
In the decimal represention of 1\k,where 0< 1\k < 1 .the tenths digit is 1,the hundredths digit is 3,and at least one other digit is nonzero.what is the tenths digit in the decimal representation of k-1\k?
这题怎么算?
问道sat数学~In the decimal represention of 1\k,where 0< 1\k < 1 .the tenths digit is 1,the hundredths digit is 3,and at least one other digit is nonzero.what is the tenths digit in the decimal representation of k-1\k?这题怎么算?
1/k = 0.13...其中后面一定有至少一个不为0的digit
(k-1)/k=1-1/k=0.86 or 0.87 不过无论如何,他的tenth digit是8.
所以答案是8