Let f : R → R and g : R → R be two (not necessarily continuous) functions. Suppose that
f
−1
((a,∞)) = g
−1
((a,∞)) for all a ∈ Q.
Show that f(x) = g(x) for all x ∈ R

What is the vertex form of f(x) = x2 + 6x + 3

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?