Question

A self-employed worker's monthly income for the past six months was fit to the function 𝑖(𝑡) = 5 + 10𝑡0.5 − 0.1𝑡 + 0.5𝑡−0.25, while his expenses were fit to 𝑔(𝑡) = 4𝑡0. 5 + 0.2𝑡 + 2. What is the mathematical expression that allows you to express your net savings, if these correspond to income - expenses? What has been the savings you have achieved in the last two months?

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Answer to a math question A self-employed worker's monthly income for the past six months was fit to the function 𝑖(𝑡) = 5 + 10𝑡0.5 − 0.1𝑡 + 0.5𝑡−0.25, while his expenses were fit to 𝑔(𝑡) = 4𝑡0. 5 + 0.2𝑡 + 2. What is the mathematical expression that allows you to express your net savings, if these correspond to income - expenses? What has been the savings you have achieved in the last two months?

Expert avatar
Sigrid
4.5
115 Answers
Para encontrar la expresión matemática que nos permite expresar los ahorros netos, primero necesitamos restar los gastos a los ingresos.

Ingresos mensuales: i(t) = 5 + 10t^{0.5} - 0.1t + 0.5t^{-0.25}

Gastos mensuales: g(t) = 4t^{0.5} + 0.2t + 2

Por lo tanto, los ahorros netos se calculan restando los gastos a los ingresos:

a(t) = i(t) - g(t) = (5 + 10t^{0.5} - 0.1t + 0.5t^{-0.25}) - (4t^{0.5} + 0.2t + 2)

Simplificando la expresión de ahorros netos:

a(t) = 5 + 10t^{0.5} - 0.1t + 0.5t^{-0.25} - 4t^{0.5} - 0.2t - 2

a(t) = 10t^{0.5} - 4t^{0.5} - 0.1t - 0.2t + 0.5t^{-0.25} - 2 + 5

a(t) = 6t^{0.5} - 0.3t + 0.5t^{-0.25} + 3

Por lo tanto, la expresión matemática que permite expresar los ahorros netos es: a(t) = 6t^{0.5} - 0.3t + 0.5t^{-0.25} + 3.

Para encontrar el ahorro de los últimos dos meses, sustituimos t = 5 y t = 6 en la expresión de ahorros netos y restamos los valores obtenidos:

a(5) = 6(5)^{0.5} - 0.3(5) + 0.5(5)^{-0.25} + 3

a(5) = 6(2.236) - 1.5 + 0.5(2.236)^{-0.25} + 3

a(5) = 13.416 - 1.5 + 0.5(2.236)^{-0.25} + 3

a(5) = 13.416 - 1.5 + 0.5(2.236)^{-0.25} + 3

a(5) ≈ 15.416

a(6) = 6(6)^{0.5} - 0.3(6) + 0.5(6)^{-0.25} + 3

a(6) = 6(2.449) - 1.8 + 0.5(2.449)^{-0.25} + 3

a(6) = 14.694 - 1.8 + 0.5(2.449)^{-0.25} + 3

a(6) = 14.694 - 1.8 + 0.5(2.449)^{-0.25} + 3

a(6) ≈ 16.694

Finalmente, el ahorro en los últimos dos meses es:

15.416 - 16.694 ≈ -1.278

Por lo tanto, el ahorro que ha logrado en los últimos dos meses es aproximadamente -1.278.

\boxed{ -1.278 }

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