MCR3U CHAPTER 7 REVIEW

Which of the following is NOT an arithmetic sequence?

• 1, 9, 17, 25, ...
• 3, 9, 14, 18, ...
• -6, -8, -10, -12, ...
• -3, 4, 11, 18, ...

Which of the following is NOT a geometric sequence?

• 2, 8, 32, 128, ...
• -3, -6, -12, -24, ...
• 1.2, 2.52, 5.292, 11.1132, ...
• 9/32, 9/8, 9/4, 9/2, ...

The first two terms in a sequence is 2 and -4. What is the 5th term if this sequence is arithmetic?

• -16
• -8
• 32
• -22

The first two terms in a sequence is 2 and -4. What is the 5th term if this sequence is geometric?

• -16
• -8
• 32
• -22

What is the formula for the general term of the arithmetic sequence -2, 3, 8, 13, ...

• t_n = 5n - 7
• t_n = t_n-1 + 5
• t_n = 5n - 3
• t_n = -2 + 5n

What is the formula for the general term of the geometric sequence -1/2, 1/6, -1/18, ...

• t_n= (-1/3)(-1/2)^n-1
• t_n= (-1/2)(-1/3)ⁿ
• t_n= (-1/2)(-1/3)^n-1
• t_n= (-1/3)(-1/2)ⁿ

What is the recursive formula for the following sequence: 3, -9, -21 ...

• t_n = t_n-1 + 3, t₁ = 3
• t_n = -12n + 15, t₁ = 3
• t_n = -12t_n-1, t₁ = 3
• t_n = t_n-1 - 12, t₁ = 3

What is the recursive formula for the following sequence: 5, 5/2, 5/4, ...

• t_n = (1/2)(5)^n-1, t₁ = 5
• t_n = 5(1/2)^n-1, t₁ = 5
• t_n = (1/2)t_n-1, t₁ = 5
• t_n = 5t_n-1, t₁ = 5

The 5th term of an arithmetic sequence is 91 and the 7th term is 57. What is the first term?

• 179
• 148
• 159
• none of the above

The 13th term of an arithmetic sequence is 189 and the 25th term is 225. What is the 55th term?

• 295

• 315

• 450

• none of the above