Mathematics
Senior High
二次関数⭐️
判別式のところからの計算がよくわかりません。
よろしくお願いします。
(2) 2次関数 y=x*-2kx+k+3 のグラフがx軸と共有点をもつとき、定数kの値の範囲を求めよ。
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