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Description: 3 is a positive real. (Contributed by Glauco Siliprandi, 11-Dec-2019)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | 3rp | ⊢ 3 ∈ ℝ+ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3re | ⊢ 3 ∈ ℝ | |
| 2 | 3pos | ⊢ 0 < 3 | |
| 3 | 1 2 | elrpii | ⊢ 3 ∈ ℝ+ |