Ch3 sequences and series Flashcards

1
Q

nth term in arithmetic

A

Un = a + (n-1)d

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

sum of first n terms arithmetic

A

Sn = n/2(2a + (n-1)d)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

nth term geometric

A

Un = ar ^n-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

sum of first n terms geometic

A

a(1-r^n) / 1-r

a(r^n-1) / r-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

sum to infinity

A

a/1-r

How well did you know this?
1
Not at all
2
3
4
5
Perfectly