LS EM Flashcards
1
Q
y is directly proportional to x
A
y/x=k or y=kx
Where k is a constant
2
Q
y is inversely proportional to x
A
xy=k or y=k/x
Where k is a constant
3
Q
Probability of event A
A
P(A) = number of outcomes favourable to A/total number of equally likely outcomes
4
Q
Sample space
A
S={ }
5
Q
+- constant diff
A
nth term = a+(n-1)d
a –> first term
d –> constant diff
6
Q
Combination formula
A
An=Bn+Cn+Dn
An –> whole sequence
Bn –> 1st type
Cn –> 2nd type
Dn –> 3rd type
7
Q
× constant diff
A
nth term = ar^(n-1)
a –> 1st term
r –> constant diff being ×
8
Q
+- varying diff
A
nth term = a+(n-1)d, +1/2(n-1)(n-2)d
a –> 1st term
d –> 1st diff
d –> constant diff btw diff
9
Q
Speed
A
D
S T
10
Q
TSA of a cube
A
6a^2
11
Q
Vol of cube
A
a^3
12
Q
TSA of cuboid
A
2lh+2hb+2lb
13
Q
Vol of cuboid
A
lbh
14
Q
Curved SA of cylinder
A
2πrh
15
Q
TSA of cylinder
A
2πrh+2πr^2
