Maths Flashcards
equation for gradient
(y2-y1) / (x2-x1)
equation for midpoint
(x1+x2 / 2), (y1 + y2 / 2)
equation for distance
√(x2-x1)^2 + (y2-y1)^2
a^2 - b^2 =
(a+b)(a-b)
proportional
y=kx
inversely proportional
y = k/x
x^0
1
x^1
x
x^n x x^m
x^(n+m)
x^n / x^m
x^(n-m)
(x^n)^m
x^(nm)
x^-2
1 / x^2
x^(1/2)
√x
arithmetic series
nth term = a + (n-1)d
d = common difference
a = first term
sum of first n terms
Sn = n/2 (a+l)
Sn = n/2 [2a + (n-1)d]
reciprocal graphs
y = n/x
ξ
universal set
∈
…is a member of…
∉
… is not a member of …
A U B
union of sets A & B
set of elements that are in A or B or both
A ∩ B
intersection of sets A & B
set of elements that are in both sets A & B
A’
complement of A
set containing all the elements that are not in A
∅
empty set
set with no members
A ⊂ B
A is a subset of B
every member of A is also in set B
