Equations outside of stats you need to know Flashcards
1
Q
General term of AP?
A
a + (n-1)d
2
Q
Sum of AP?
A
n/2 (2a+(n-1)d)
3
Q
Geometric series eq?
A
a x r^n-1
4
Q
Sum of geometric series?
A
a(1-r^n)/ 1-r
5
Q
rewriting e^a
A
-sum to infinity a^x / x!
6
Q
Sum of infinite terms, GEOMETRIC POGRESSION?
A
a / 1-r
7
Q
sum r^2 eq?
A
1/6 n (n+1)(2n+1)
8
Q
sum r^3 eq?
A
1/4 n^2 (n+1)^2
9
Q
sum r eq?
A
1/2 n(n+1)
10
Q
0! ?
A
1
11
Q
e^-kx integral?
A
1/k
