问题
填空题
对实数a、b，定义“★”运算规则如下：a★b=
|
答案
∵
★2
=3
，3
∴
★（7
★2
）3
=
★7 3
=(
)2-(7
)23
=4
=2．
故答案为：2．
搜题请搜索小程序“爱下问搜题”
对实数a、b，定义“★”运算规则如下：a★b=
|
∵
★2
=3
，3
∴
★（7
★2
）3
=
★7 3
=(
)2-(7
)23
=4
=2．
故答案为：2．