判断下列问题是否正确,并说明原因(∃ x)(p(x)→Q(y)∧R(z))中约束变元为y
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![判断下列问题是否正确,并说明原因(∃ x)(p(x)→Q(y)∧R(z))中约束变元为y](/uploads/image/z/6431204-20-4.jpg?t=%E5%88%A4%E6%96%AD%E4%B8%8B%E5%88%97%E9%97%AE%E9%A2%98%E6%98%AF%E5%90%A6%E6%AD%A3%E7%A1%AE%2C%E5%B9%B6%E8%AF%B4%E6%98%8E%E5%8E%9F%E5%9B%A0%EF%BC%88%26%238707%3B+x%EF%BC%89%EF%BC%88p%EF%BC%88x%EF%BC%89%E2%86%92Q%EF%BC%88y%EF%BC%89%E2%88%A7R%EF%BC%88z%EF%BC%89%EF%BC%89%E4%B8%AD%E7%BA%A6%E6%9D%9F%E5%8F%98%E5%85%83%E4%B8%BAy)
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