Flashcards : Fundamentals of Number Sets and Operations — 10 cartes

ℕ ⊂ ℤ ⊂ ⅅ ⊂ ℚ ⊂ ℝ

ℕ ⊂ ℤ ⊂ ⅅ ⊂ ℚ ⊂ ℝ

Open, closed, infinite intervals

Uses brackets or parentheses to specify bounds; open uses ]a;b[.

Measures distance from zero

|x| = x if x ≥ 0; = -x if x < 0.

Combines elements from both sets.

Finds common elements of sets.

x = c ± d; two solutions.

Defined by lower and upper limits; open or closed.