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)