Sequence

Question 1

Arithmetic Sequence Formula

Answer 1

an= a1+(n-1)d

Question 2

Arithmetic Means Formula

Answer 2

x= (x1+x2)/2

Question 3

Common Difference Formula

Answer 3

a2-a1=d

Question 4

Geometric Sequence Formula

Answer 4

an= a1(r^n-1)

Question 5

Geometric Means Formula

Answer 5

GM= square root of a(b)

Question 6

Geometric Series Formula (Partial Sum)

Answer 6

Sn= [a1(1-r^n)]/[1-r]

Question 7

Geometric Series Formula (Infinite Sum)

Answer 7

Sn= a1/1-r

Question 8

Harmonic Sequence

Answer 8

Use arithmetic seq formula, but reciprocal the given first; then reciprocal the answer.