第3冊單元2-1平方根與近似值
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下列敘述何者正確?
0.2為0.4的平方根
\sqrt{81}的平方根為9
0.12為1.44的平方根
-3是9的平方根
下列敘述何者正確?
下列各式中何者正確?
下列敘述何者錯誤?