PURE Flashcards
1
Q
How do you find the number of real roots?
A
Use the discriminant
1
Q
What is the turning point for equations a(x+p)+Q
A
(-p,q)
2
Q
What is the translation y=f(x)+c
A
c units up
3
Q
What is the translation y=f(x+d)
A
d units to the left
4
Q
What is the translation y=pf(x)
A
vertical stretch sfp in the xaxis
5
Q
What is the translation y=f(qx)
A
horizontal stretch sf1/q in the yaxix
5
Q
What do the gradients of two perpendicular lines multiply to give
A
-1
6
Q
What may you need to do to find the equation of a circle?
A
Complete the square
7
Q
log(xy)=
A
log(x) + log(y)
8
Q
log(x/y)
A
log(x) - log(y)
9
Q
log(1/x)
A
-logx
10
Q
if y=Ae^kt then what does A=?
A
The initial value
11
Q
if y=Kb^x they how can this be written using log form?
A
log(y)=log(k)+(x)log(b)
12
Q
nCr factorial formula?
A
n!/r!(n-r)!
13
Q
what does tan=?
A
sin/cos
