Quiz about Algebra IIC - Unit 10 Quizizz

Question 1

What are the first 5 terms of the sequence $$a_1=-4\ ;\ a_n=a_{n-1}-6\ \left(for\ n\ge2\right)$$ ?

Accepted Answer

-4, -10, -16, -22, -28

Answer

3, 8, 14, 30, 58

Answer

13, 11, 9, 7, 5

Answer

-19, -12, 7, 44, 105

Question 2

Find the partial sum of the sequence {0, -1, -3, -6, -10, ...} for $$s_{14}$$ .

Accepted Answer

-455

Answer

-141

Answer

-205

Answer

-364

Question 3

Evaluate the series $$\sum_{x=1}^{10}\left(x-2\right)^2=$$

Accepted Answer

205

Answer

169

Answer

196

Answer

141

Question 4

Write a rule for the sequence $$\left\{-7,\ -4,\ -1,\ 2,\ ...\right\}\ ;\ a_{38}$$

Accepted Answer

$$a_n=3\left(n-1\right)-7$$

Answer

$$a_n=2\left(n-1\right)-7$$

Answer

$$a_n=3\left(n+1\right)-7$$

Answer

$$a_n=3\left(n-1\right)+7$$

Question 5

Find the indicated term for the sequence $$\left\{-7,\ -4,\ -1,\ 2,\ ...\right\}\ ;\ a_{38}$$

Accepted Answer

104

Answer

98

Answer

101

Answer

107

Question 6

What is the common ratio of the geometric sequence {3, -6, 12, -24, 48, ...}?

Accepted Answer

-2

Answer

-1/2

Answer

3

Answer

-4

Question 7

$$Given\ a_1=3645\ and\ a_6=15\ of\ a\ geometric\ sequence,\ find\ a_3.$$

Accepted Answer

405

Answer

45

Answer

135

Answer

1215

Question 8

$$Given\ a_1=5\ and\ r=-4\ of\ a\ geometric\ sequence,\ find\ a_4.$$

Accepted Answer

-320

Answer

80

Answer

1280

Answer

5120

Question 9

$$Given\ the\ sequence\ \left\{30,\ 23,\ 16,\ 9,\ 2,\ ...\right\},\ find\ s_{19}.$$

Accepted Answer

-627

Answer

-573

Answer

-592

Answer

-649

Question 10

$$Given\ the\ sequence\ \left\{3,\ -12,\ 48,\ -192,\ ...\right\},\ find\ s_8.$$

Accepted Answer

-39321

Answer

65535

Answer

-65535

Answer

39321

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