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代入します。(-4≦x≦3)

y=1/2×3²   y=1/2×(-4)²
=1/2×9    =1/2×16
=2/9     =8

xの最小値が-4で原点を通っているので
0≦y≦8

(2)については私もちょっと何言ってるのかわかんないです😥

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