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18 questions
Write a formula for the following sequence:
5, 8, 11, 14, 17...
an = 3n + 2
an = 8 - 5n
an = 5(3)n-1
an = 5 + 3n
Write a formula for the following sequence:
4, 12, 36, 108...
an = 4(3n-1)
an = 4(3n)
an = 4+3n
an = 4(3n)
Find a18 for the following geometric sequence,
-3, 6, -12, 24,,,
-37
-786,432
393,216
258,280,326
For an arithmetic sequence, f(1)=⅘ and the common difference is -1. What is f(20)?
18 ⅕
−⅕
−20 ⅕
−18 ⅕
Given a1 = 3 and a6= 13, what is the common difference?
2
3
10
1
x=4∑39(5x+2) Find the sum
3125
3942
3623
3952
Given the sequence:
125, 25, 5, ....
Write the rule an using the geometric sequence formula:
an = (125)(1/5)(n-1)
an = 625(1/5)(n-1)
an = 625(5)(n-1)
an = 125 + 5n
This is an arithmetic sequence. 8, 7.3, 6.6, 5.9, . . .
What function describes the sequence?
f (x) = −0.7x + 8
f (x) = −0.7x + 8.7
f (x) = 0.7x + 8
f (x) = 0.7x + 8.7
Find the next three terms of the following geometric sequence:
4, 12, 36, 108, ...
324, 972, 2916
972, 2916, 8748
405, 1215, 3645
324, 648, 1296
Find the sum of the geometric series.
2 + 12 + 72 + 432
432
518
211
438
Evaluate k = 1∑7(−2)k −1
44
31
43
49
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