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If y=2x+1 ,what is the value of y-x?
(1)22x+2 =64
(2)y=22x−1
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条件一 2^(x+1)的平方=64 可得2^(x+1) 可得y-x
条件二 两个y联立 可得x和y的值 可得y-x
科目：
数据充分DS
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难题300
题目信息1m10s
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90.4%
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点击上传数据充分DS -17949
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数据充分DS -17905
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数据充分DS -17949
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数据充分DS -17947
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数据充分DS -17922
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数据充分DS -17912
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