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Gelneren [198K]
3 years ago
12

The first four terms of a geometric progression are 84, 42, 21, 10.5 a) write down the common ratio of the progression b) write

down the fifth term of the progression
Mathematics
1 answer:
Ket [755]3 years ago
3 0

Answer:

r = 0.5 and 5.25

Step-by-step explanation:

The common ratio r of a geometric progression is the ratio of a term to the one before it, that is

(a)

r = 42 ÷ 84 = 0.5

(b)

To obtain a term in the sequence multiply the previous term by r, thus

a₅ = 10.5 × 0.5 = 5.25

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3 0
3 years ago
Read 2 more answers
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Inessa [10]
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6 0
4 years ago
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