Sequences Check In

What type of sequence is: 11, 8, 5, 2, -1,....

• arithmetic

• geometric

• neither

• mathometric

Tags

CCSS.HSF.BF.A.2

What type of sequence is: 4, -8, 16, -32,..?

• Geometric (r = -2)

• Arithmetic (d = 4)

• Geometric (r = 2)

• Arithmetic(d = -4)

Tags

CCSS.HSF.BF.A.2

Solve for the difference in the arithmetic sequence: -50, -75, -100, -125,....

• d = 25

• d = -25

• d = 1.5

• d = -1.5

Tags

CCSS.HSF.BF.A.2

Solve for the ratio in the geometric sequence: 100, 80, 64, 51.2

• r = 0.8

• r = 1.25

• r = -20

• r = 20

Tags

CCSS.HSF.BF.A.2

Write a formula for the arithmetic sequence using n-1 and f(n) or a(n)

Tags

CCSS.HSF.BF.A.2

Which is a formula for the arithmetic sequence: 5, -3, -11, -19, -27,....

• f(n) = -8(n-1) + 5

• f(n) = 5(n-1) - 8

• a(n) = 5 + 8(n-1)

• a(n) = 8 + 5(n-1)

Tags

CCSS.HSF.BF.A.2

Create a formula for the arithmetic sequence 10, 16, 22, 28 in the form of f(n) = d(n-1) + f(1)

Tags

CCSS.HSF.BF.A.2

Which term is not the same as the others?

• a(n)

• f(n)

• nth term

• They are all the same

Tags

CCSS.HSF.BF.A.2

Choose the correct formula for a geometric sequence:

• $a_n=a_1\left(r\right)^{n-1}$

• $a_n=a_1\left(r\right)^n$

• $a_n=r\left(a_1\right)^{n-1}$

• $a_1=a_n\left(r\right)^{n-1}$

Tags

CCSS.HSF.BF.A.2

If I only had the 21st and 6th terms in an arithmetic sequence, how could a formula to find d look?

• a(21) = a(6) + d(21-6)

• a(21) = a(6) + d(n-1)

• a(21) = a(6) + d(21-1)

• a(21) = a(6) + d(21+6)

Tags

CCSS.HSF.BF.A.2