定义:a*b=a2-b,则(1*2)*3=___.
人气:181 ℃ 时间:2020-01-31 03:49:31
解答
∵a*b=a2-b,
∴(1*2)*3=(12-2)*3
=(-1)*3
=(-1)2-3
=-2,
故答案为-2.
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