Write down the negation of each of the following statements in clear and concise English. Do not use the expression “It is not the case that” in your answers.
(a) [BB] Either a2 > 0or a is not a real number.
(b) x is a real number and x2 +1 = 0.
(c) [BB] x = ±1.
(d) Every integer is divisible by a prime.
(e) [BB] For every real number x, there is an integer n such that h > x.
(f) There exist a, b, and c such that (ab)c ≠ a (be).
(g) [BB] There exists a planar graph that cannot be colored with at most four colors.
(h) Every Canadian is a fan of the Toronto Maple Leafs or the Montreal Canadiens.
(i) For every x > 0, x2 + y2 > 0for all y.
(j) − 2 < x < 2.
(k) [BB] For all integers a and b, there exist integers q and r such that b = qa + r.
(l) [BB] There exists an infinite set whose proper subsets are all finite.
(m) There exists a real number x such that, for every integer n, either n < x or n ≥ x + 1.
(n) If n is an integer, is not an integer.
(o) a ≤ x and a ≤ y and a ≤ z.
(p) Every vector in the plane is perpendicular to some normal.
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