In the initial period of its life a particular species of tree grows in the manner described by the rule d=d010mt𝑑=𝑑010𝑚𝑡 where d𝑑 is the diameter (in cm) of the tree t𝑡 years after the beginning of this period. The diameter is 52 cm after 1 year, and 80 cm after 3 years. Calculate the values of the constants d0𝑑0 and m𝑚
Question
In the initial period of its life a particular species of tree grows in the manner described by the rule d=d010mt𝑑=𝑑010𝑚𝑡 where d𝑑 is the diameter (in cm) of the tree t𝑡 years after the beginning of this period. The diameter is 52 cm after 1 year, and 80 cm after 3 years. Calculate the values of the constants d0𝑑0 and m𝑚
Solution
Para resolver el problema, sigamos los siguientes pasos:
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Identificar la fórmula dada: donde es el diámetro del árbol en cm, es el tiempo en años, es una constante inicial y es otra constante.
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Usar los datos proporcionados para establecer dos ecuaciones:
- Cuando , :
- Cuando , :
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Dividir la segunda ecuación por la primera para eliminar : Simplificando:
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Resolver para : Tomamos logaritmo en base 10 en ambos lados:
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Calcular el valor de : Usando una calculadora:
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Usar el valor de para encontrar : Sustituimos en una de las ecuaciones originales, por ejemplo: [ 52 = d_0 \cdot 10^{0.08805}
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