Arithematic Progression Flashcards
1
Q
When first term and common difference are given:
A
Sun = n/2 (2a + (n-1)d)
2
Q
When the first and last term are given
A
Sn = n/2 (a+l)
3
Q
an
A
an = a + (n+1)d
4
Q
an from last
A
an = l - (n-1)d
5
Q
Arithematic mean
A
b = a+c/2
