Progresii aritmetice Flashcards
1
Q
Termenul general
A
an = a1+(n-1)*r
2
Q
Ratia
A
r=an-an-1
3
Q
a, b, c
A
b= a+c/2
4
Q
suma
A
sn=(a1+an) *n/2
Termenul general
an = a1+(n-1)*r
Ratia
r=an-an-1
a, b, c
b= a+c/2
suma
sn=(a1+an) *n/2