[高中]複數
看到一個題目
是高中學校的考題
_____
√2-√5=(2-√5)^1/2 是錯的,為什麼?
想了很久想不出來不對在哪?
難道i不可以寫成 (-1)^1/2 嗎?
跪求版上強者的解答,謝謝
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