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SSSSS [86.1K]
3 years ago
13

Given a geometric sequence with a1 = 3 and a4 = 24, find a2.

Mathematics
1 answer:
Phantasy [73]3 years ago
4 0

Answer: 6

Step-by-step explanation:

ax/ay=r^(x-y)

in this case it will be

a4/a1=r^(4-1)

24/3=r^3

8=r^3

r=2

----------------------------------

an=a1×r^(n-1) ⇔ geometric sequence formula

a2=3×2^(2-1)

a2=3×2^1

a2=3×2

a2=6

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Um terreno retangular possui o comprimento cinco vezes maior que a largura. Sabendo que o perímetro desse terreno é igual a 180
icang [17]

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15 m e 75 m

Explicação passo a passo:

Deixar :

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Perímetro = 2 (comprimento + largura)

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