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19-10-2020
Mathematics

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Please help. This question is on geometric sequences

Please help This question is on geometric sequences class=

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oscar236 oscar236

19-10-2020

Answer:

13.89 to 2 dec places.

Step-by-step explanation:

a7 / a5 = r^2 where r is the common ratio.

So 3/5 = r^2

r^2 = 0.6

r = +√0.6

r = 0.7746.

The first term is a5 / r^4

= 5 / (0.7746)^4

= 13.89.

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