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Which represent geometric sequences?
A
A marathon runner runs half of a race, then runs half the distance left to the finish line, then runs half the distance that still remains, and so on.B
The first movie rental costs $2, and each additional rental costs $1.C
10, 1, 0.1, 0.01, …D
OptionE
–4, 20, –100, 500, …F
–1, 5, 11, 17, 23, …2
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Partial sum of a geometric series What is the partial sum of the first fourteen terms?
A
389.24B
387.24C
1,161.717D
1,163.7173
Find the explicit rule for the given sequence.2, 3, 4.5, 6.75, 10.125, . . .
A
an = 2 + (n – 1)B
an= 2(1.5)n–1C
an = 2 + (n – 1)(1.5)D
an = (1.5)n–1Did you find these answers helpful?
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