Mathematics
Senior High
なんでその対称式が成り立つんですかー？
+y+z=(x+y+z)°-3(x+ytz)(xy+yz+zx)+3xyz
x+y+z=2V3+1, xy+yz+zx=2/3-1, xyz=-1 を満たす実数 x, y, 2
の
9|して,次の式の値を求めよ。
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ありがとうございます.ᐟ.ᐟ