# Sequences: Because We'd Rather Start Counting from Zero Quiz

*? Put your knowledge to the test. Good luck — the Stickman is counting on you!*

**Sequences***n*

^{th}number is given by a mathematical formula.

Find *a*_{2}.

*a*be the decimal expansion of correct to

_{n}*n*decimal places.

Find *a*_{1}.

*n*= 0?

*a*= 2

_{n}*n*+ 1

*a*= 2

_{n}*n*– 1

*a*= 2(

_{n}*n*+ 1)

*a*= 2(

_{n}*n*– 1)

0, -10, 20, -30, 40, -50

if we start with *n* = 0.

*a*= 10(

_{n}*n*– 1)

*a*= (-1)

_{n}^{n – 1}10(

*n*– 1)

*a*= (-1)

_{n}*10*

^{n}*n*

*a*= (-1)

_{n}^{n + 1}10

*n*

starting with *n* = 1.

1, 2, 3, 4,... ?

(I) *a _{n}* =

*n*starting at

*n*= 1

(II)

*a*=

_{n}*n*– 1 starting at

*n*= 1

(III)

*a*=

_{n}*n*starting at

*n*= 0

(IV)

*a*= (

_{n}*n*+ 1) starting at

*n*= 0

0.5, 2, 4.5, 8, 12.5, ...

starting with *n* = 1.

*a*= 1.5

_{n}*n*– 1

*a*= 6

_{n}*n*

^{2}starting at

*n*= 0

*a*= 6

_{n}*n*

^{2}starting at

*n*= 1

*a*=

_{n}*n*

^{3 }–

*n*starting at

*n*= 0

*a*=

_{n}*n*

^{3 }–

*n*starting at

*n*= 1

starting with *n* = 1.