Arithmetic and Geometric Sequences Practice
PreCalculus
Name___________________________________ ID: 1
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Arithmetic and Geometric Sequences Practice
Date________________ Period____
Find the common difference, the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
1) -32, 168, 368, 568, ... Find a
20
2) 3, -2, -7, -12, ... Find a
36
Given the second term and the common difference of an arithmetic sequence find the term named in the problem and the explicit formula.
3) a = 16, d = -9 2 Find a 21
4) a = 45, d = 7 2 Find a 28
Given a term in an arithmetic sequence and the common difference find the term named in the problem and the explicit formula.
5) a = 38, d = 2 24 Find a 36
6) a = -60, d = -10 9 Find a 35
Given two terms in an arithmetic sequence find the common difference, the term named in the problem, and the explicit formula.
7) a = -73 and a = -280
12
35
Find a 28
8) a = -1268 and a = -3468
14
36
Find a 30
Worksheet by Kuta Software LLC
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Find the common ratio, the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
9) -4, -8, -16, -32, ... Find a
11
10) -1, 2, -4, 8, ... Find a
12
Given the first term and the common ratio of a geometric sequence find the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
11) a = 1, r = 3 1 Find a 9
12) a = -4, r = 3 1 Find a 12
Given a term in a geometric sequence and the common ratio find the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
13) a = 12, r = -3 2 Find a 9
14) a = -64, r = -2 5 Find a 10
Given two terms in a geometric sequence find the common ratio, the term named in the problem, and the explicit formula.
15) a = -972 and a = -36
6
3
Find a 12
16) a = 128 and a = 64
6
5
Find a 12
Worksheet by Kuta Software LLC
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PreCalculus
Name___________________________________ ID: 1
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Arithmetic and Geometric Sequences Practice
Date________________ Period____
Find the common difference, the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
1) -32, 168, 368, 568, ... Find a
20
Common Difference: d = 200 Next 3 terms: 768, 968, 1168 a = 3768
20
Explicit: a = -232 + 200n n
2) 3, -2, -7, -12, ... Find a
36
Common Difference: d = -5 Next 3 terms: -17, -22, -27 a = -172
36
Explicit: a = 8 - 5n n
Given the second term and the common difference of an arithmetic sequence find the term named in the problem and the explicit formula.
3) a = 16, d = -9 2 Find a 21
a = -155 21
Explicit: a = 34 - 9n n
4) a = 45, d = 7 2 Find a 28
a = 227 28
Explicit: a = 31 + 7n n
Given a term in an arithmetic sequence and the common difference find the term named in the problem and the explicit formula.
5) a = 38, d = 2 24 Find a 36
a = 62 36
Explicit: a = -10 + 2n n
6) a = -60, d = -10 9 Find a 35
a = -320 35
Explicit: a = 30 - 10n n
Given two terms in an arithmetic sequence find the common difference, the term named in the problem, and the explicit formula.
7) a = -73 and a = -280
12
35
Find a 28
Common Difference: d = -9 a = -217
28
Explicit: a = 35 - 9n n
8) a = -1268 and a = -3468
14
36
Find a 30
Common Difference: d = -100 a = -2868
30
Explicit: a = 132 - 100n n
Worksheet by Kuta Software LLC
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Find the common ratio, the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
9) -4, -8, -16, -32, ... Find a
11
Common Ratio: r = 2 Next 3 terms: -64, -128, -256 a = -4096
11
Explicit: a = -4 ? 2 n - 1 n
10) -1, 2, -4, 8, ... Find a
12
Common Ratio: r = -2 Next 3 terms: -16, 32, -64 a = 2048
12
Explicit: a = -(-2)n - 1 n
Given the first term and the common ratio of a geometric sequence find the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
11) a = 1, r = 3 1 Find a 9
Next 3 terms: 3, 9, 27 a = 6561
9
Explicit: a = 3 n - 1 n
12) a = -4, r = 3 1 Find a 12
Next 3 terms: -12, -36, -108 a = -708588
12
Explicit: a = -4 ? 3 n - 1 n
Given a term in a geometric sequence and the common ratio find the term named in the problem, the explicit formula, and the three terms in the sequence after the last one given.
13) a = 12, r = -3 2 Find a 9
Next 3 terms: -36, 108, -324 a = -26244
9
Explicit: a = -4 ? (-3)n - 1 n
14) a = -64, r = -2 5 Find a 10
Next 3 terms: 128, -256, 512 a = 2048
10
Explicit: a = -4 ? (-2)n - 1 n
Given two terms in a geometric sequence find the common ratio, the term named in the problem, and the explicit formula.
15) a = -972 and a = -36
6
3
Find a 12
Common Ratio: r = 3 a = -708588
12
Explicit: a = -4 ? 3 n - 1 n
16) a = 128 and a = 64
6
5
Find a 12
Common Ratio: r = 2 a = 8192
12
Explicit: a = 4 ? 2 n - 1 n
Worksheet by Kuta Software LLC
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