• 2022-06-07
    给定解释I:①个体域DI为整数集合 ②a = 1 ③f(x, y) = x-y,g(x, y) = x+y ④F(x, y)为x < y. 赋值s1:s(y)= -2. 在解释I和赋值s下,∀x(F(x, a)®F(f(x, y), g(x, y)))的真值为______