高校受験数学 難関突破の極意シリーズ（75） 函館ラ・サール高校入試
Synopsis
一次関数と三角形の面積を２等分する問題は頻出です。等積変形の裏技を駆使しましょう。 難関上位中学＆高校受験で抜群の合格 ...
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