Quadratic Sequences

What is the 4th term of the sequence with nth term

t_n = 2n² - 6n + 15 ?

• 23

• 25

• 27

• 19

What is the 8th term of the quadratic sequence

t_n = 7 + 12n - n² ?

Type your answer in without spaces or decimals

The sequence 5, 9, 13, 17, is ...

(select all answer that apply)

• a quadratic sequence

• a linear sequence

• neither a linear nor a quadratic sequence

• a Fibonacci sequence

The sequence 7, 22, 49, 88 ...

(select all answer that are correct)

• is a quadratic sequence

• has 5th term 139

• has 6th term 204

• is a linear sequence

Given the quadratic sequence 7, 12, 23, 40, ...

what is the coefficient of n² in the expression for the nth term?

• 2

• 3

• 4

• 1

Given the quadratic sequence with nth term t_n = x² - 4x + 5, which value of n gives a term value of 170?

• 9

• 11

• 13

• 15

Given the sequence 6, 9, 16, 27, ...

Select all answers that are correct:

• This is a quadratic sequence

• The coefficient of n in the nth term is -3

• The 7th term is 84

• 216 is part of the sequence

• The coefficient of n² in the nth term is 3

What is the expression for the nth term of the sequence below:

0, -1, 0, 3

• t_n = n² - 4n + 3

• t_n = n² - 1

• t_n = 2n² - n - 1

• t_n = n² - 5n + 4