chapter 2 year 1 pure Flashcards
what are the set of inputs in a function called
domain
where does domain usually refer to
x axis
what are the set of outputs called in a function
range
where does the range usually refer to
y axis
what are the roots of a function
value of x for which f(x) = 0
what does this notation mean:
xER (bubble writing R)
x is a member of the set of real numbers
what is the discriminant
the expression b^2 - 4ac
what does the value of the discriminant show?
How many roots F (X) has
if b^2 - 4ac > 0 then the quadratic function has how many roots
it has two distinct real roots
if b^2 - 4ac = 0 how many roots does this quadratic function have?
it has one repeated real root
if b^2 - 4ac < 0 how many roots does this quadratic function have?
it has no real roots
what is one example of modelling with quadratics?
Projectile motion
