sequences and series

Question 1

arithmetic sequence explicit formula

Answer 1

An= A1+d(n-1)

Question 2

arithmetic sequence recursive formula

Answer 2

always state A1 first

A1=
An=An-1 + d

Question 3

arithmetic sequence
what do a1=
An-1=
n=
d=

Answer 3

a1= first term
An-1=previous term
n= term number
d=common difference

Question 4

Geometric explicit formula

Answer 4

An=A1 x (r)^n-1

Question 5

geometric recursive formula

Answer 5

A1=
An=An-1 x r

Question 6

geometric sequence
A1=
n=
r=

Answer 6

A1=first term
n= term number
r=common ratio

Question 7

sigma notation
what does n mean
what does i=number mean
what does expression on right hand side mean

Answer 7

n= number of ending term in series(on top)
i=1 number of starting term in the series
expression= explicit formula

Question 8

sums of finite sequences
- arithmetic series formula

Answer 8

N/2(a1+an)

A1= first erm
An= nth term in the sum
n= number of terms

Question 9

Sums of finite sequences
-geometric series formula

Answer 9

A1-A1(r)^n/1-r

a1= first term
r= common ratio
n=number of terms
if percent occisoanly add one(bank)