Sequences!

?

100

Arithmetic or Geometric? -10, -5, 0, 5

Arithmetic

200

Whats the common ratio? -750, 150, -30, 6

-1/5

300

Find the first 3 terms of 3n/8.

3/8, 3/4, 9/8...

400

Write a recursive formula for the following 2, 4, 6, 8...

A_n=A_n-1+2, A₁=2

500

Write the explicit formula for 4, 32, 256, 2048?

Gn=4(8)^n-1

??

100

Arithmetic or Geometric? -20, -10, -5, -2.5

Geometric

200

What is the common difference? 5, -15, -35, -55

-20

300

What is the general explicit formula for arithmetic sequences?

A_n=A₁+d(n-1)

400

Find a₃₀ for 4, 8, 12, 16...

120

500

Write the recursive formula for 300, 150, 75, 37.5...

G_n=G_n-1(1/2), G₁=300

???

100

What is A₃ for 3, 7, 11, 15...

11

200

What is the common difference? -10, -8, -6, -4...

+2

300

What is the general recursive formula for arithmetic sequences?

A_n=A_n-1+d, A₁=

400

Find a₁₅ for 5, -3, -11, -19...

-107

500

Write the recursive formula for 4, 0, -4, -8...

A_n=A_n-1-4, A₁=4

????

100

What is G₄ for 3, 12, 48, 192...

192

200

If G_n=3, what is n?

3, -6, 12, -24...

1

300

What is the general explicit formula for geometric sequences?

G_n=G_n-1*r, G₁=

400

Find G₈ for -1, 2, -4, 8...

128

500

Write the explicit formula for 200, 197, 194, 191...

A_n=200-3(n-1)

?????

100

If An=30, what is n?

10, 20, 30, 40...

3

200

What term is 125?

1, 5, 25, 125...

G₄

300

What is the general recursive formula for geometric sequences?

G_n=G₁*r^n-1

400

Find G₇ for 1, 30, 900, 27000...

729,000,000

500

Write the explicit formula for -5, 15, -45, 135...

G_n=-5(-3)^n-1