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Mathematics
Senior High
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) 2次方程式 3z2 6x上2カー1ニ0 が実数角をもつ<
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T
T

判別式DとしてD≧0を求めます。

D=36-4･3(2m-1)
=-24m+48

-24m+48≧0
24m≦48
m≦2

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