BLACKLINE MASTER 1-1
Pre – Calculus Math 11 Worksheet (Geometric Sequences)
YOU MUST SHOW YOUR WORK WHENEVER POSSIBLE!
1. Determine if the sequence is geometric. If it is, state the common ratio and the general term in the form
([pic]).
a) 1, 2, 4, 8, … b) 2, 4, 6, 8, …
c) 3, -9, 27, -81, … d) 1, 1, 2, 4, 8, …
2. Given the geometric sequence 1.28, 0.64, 0.32, …, find the common ratio, t6 and t10.
3. Determine the first four terms of each geometric sequence.
a) t1 = 2, r = 3 b) t1 = -3, r = -4
4. Determine the missing terms (t2, t3, and t4), in the geometric sequence in which t1 = 8.1 and t5 = 240.1.
5. Determine the general formula ([pic]) for the geometric sequence.
a) r = 2, t1 = 3 b) 192, -48, 12, -3, …
c) t3 = 5, t6 = 135 d) t1 = 4, t13 = 16 384
6. Given the following geometric sequences, determine the number of terms, n.
| |a |r |tn |
|a) |5 |3 |135 |
|b) |-2 |-3 |-1458 |
a) b)
7. The following sequence 3, 12, 48, 5y + 7, … is geometric. What is the value of y?
8. A ball is dropped from a height of 3.0 m. After each bounce it rises to 75% of its previous height.
a) Write the first term and the common ratio of the geometric sequence.
b) Write the general term for the sequence in part a).
c) What height does the ball reach after the 6th bounce?
d) After how many bounces will the ball reach a height of approximately 40 cm?
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