Odpowiedź:
Szczegółowe wyjaśnienie:
Zad 1
a₁ = 98 , a₄ = 13
a₄ = a₁ * q³
13 = 98 * q³ I 98
q³ = 13/98 I ∛
q = √(13/98) = √13 / √98 = √(13 * 98) / 98 = (√1274) / 98
Zad 2
a₁ = 27 , a₂ = 18 , a₃ = x + 5
a₂ / a₁ = a₃ / a₂
18/27 = (x + 5) / 18
2/3 = (x + 5) / 18 I * 18
36/3 = x + 5
12 = x + 5 I - 5
7 = x
x = 7
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Odpowiedź:
Szczegółowe wyjaśnienie:
Zad 1
a₁ = 98 , a₄ = 13
a₄ = a₁ * q³
13 = 98 * q³ I 98
q³ = 13/98 I ∛
q = √(13/98) = √13 / √98 = √(13 * 98) / 98 = (√1274) / 98
Zad 2
a₁ = 27 , a₂ = 18 , a₃ = x + 5
a₂ / a₁ = a₃ / a₂
18/27 = (x + 5) / 18
2/3 = (x + 5) / 18 I * 18
36/3 = x + 5
12 = x + 5 I - 5
7 = x
x = 7