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Inverse proposition, negative proposition and inverse negative proposition in mathematics
1. Inverse proposition: If x 2? X+ 1 ≤ 0, then? x ∈ R

There is no proposition: if? X ∈ R, then x 2? x+ 1 & gt; 0

Negative proposition: if x2-x1>; 0, and then what? X ∈ R (or X does not belong to R)

2. inverse proposition: if X 2? X+ 1 ≤ 0, then? x ∈ R

There is no proposition: if? X ∈ R, then x 2? x+ 1 & gt; 0

Negative proposition: if x 2? x+ 1 & gt; 0, and then what? X≮R (no X belongs to R)