Intro to Geometric Sequences

What is the formula for the n-th term in an arithmetic sequence?

• a sub n equals a sub 1 plus n minus 1 times d

• a sub n equals a sub 1 times r to the n minus 1

• S sub n equals n divided by 2 times a sub 1 plus a sub n

• S equals a sub 1 over 1 minus r

Which sequence type involves a common difference?

• Geometric sequence

• Arithmetic sequence

• Harmonic sequence

• Fibonacci sequence

In a geometric sequence, what does the variable 'r' represent?

• The number of terms

• The common ratio

• The common difference

• The first term

How do you calculate the partial sum of a geometric sequence?

• a sub 1 times 1 minus r to the n divided by 1 minus r

• a sub 1 plus n minus 1 times d

• a sub 1 over 1 minus r

• n divided by 2 times a sub 1 plus a sub n

What is the formula for the infinite sum of a geometric sequence?

• a sub n equals a sub 1 times r to the n minus 1

• a sub n equals a sub 1 plus n minus 1 times d

• S sub n equals n divided by 2 times a sub 1 plus a sub n

• S equals a sub 1 over 1 minus r