✨ Best Answer ✨
x-1<0を①、x²-4x≧0を②と分けて考えます！
①より、x<1
②より、x(x-4)≧0 x≦0，4≦x
よって①と②の共通範囲より、
答えはx≦0だとおもいます！
間違っていたらごめんなさい！
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