Precálculo Ejemplos

$c (x) = 0.2 x^{3} + 4 x + 4000$

Paso 1

Considera la fórmula del cociente diferencial.

$\frac{f (x + h) - f (x)}{h}$

Paso 2

Obtén los componentes de la definición.

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Paso 2.1

Evalúa la función en $x = x + h$ .

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Paso 2.1.1

Reemplaza la variable $x$ con $x + h$ en la expresión.

$c (x + h) = 0.2 {(x + h)}^{3} + 4 (x + h) + 4000$

Paso 2.1.2

Simplifica el resultado.

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Paso 2.1.2.1

Simplifica cada término.

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Paso 2.1.2.1.1

Usa el teorema del binomio.

$c (x + h) = 0.2 (x^{3} + 3 x^{2} h + 3 x h^{2} + h^{3}) + 4 (x + h) + 4000$

Paso 2.1.2.1.2

Aplica la propiedad distributiva.

$c (x + h) = 0.2 x^{3} + 0.2 (3 x^{2} h) + 0.2 (3 x h^{2}) + 0.2 h^{3} + 4 (x + h) + 4000$

Paso 2.1.2.1.3

Simplifica.

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Paso 2.1.2.1.3.1

Multiplica $3$ por $0.2$ .

$c (x + h) = 0.2 x^{3} + 0.6 (x^{2} h) + 0.2 (3 x h^{2}) + 0.2 h^{3} + 4 (x + h) + 4000$

Paso 2.1.2.1.3.2

Multiplica $3$ por $0.2$ .

$c (x + h) = 0.2 x^{3} + 0.6 (x^{2} h) + 0.6 (x h^{2}) + 0.2 h^{3} + 4 (x + h) + 4000$

Paso 2.1.2.1.4

Elimina los paréntesis.

$c (x + h) = 0.2 x^{3} + 0.6 x^{2} h + 0.6 x h^{2} + 0.2 h^{3} + 4 (x + h) + 4000$

Paso 2.1.2.1.5

Aplica la propiedad distributiva.

$c (x + h) = 0.2 x^{3} + 0.6 x^{2} h + 0.6 x h^{2} + 0.2 h^{3} + 4 x + 4 h + 4000$

Paso 2.1.2.2

La respuesta final es $0.2 x^{3} + 0.6 x^{2} h + 0.6 x h^{2} + 0.2 h^{3} + 4 x + 4 h + 4000$ .

$0.2 x^{3} + 0.6 x^{2} h + 0.6 x h^{2} + 0.2 h^{3} + 4 x + 4 h + 4000$

Paso 2.2

Reordena.

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Paso 2.2.1

Mueve $x^{2}$ .

$0.2 x^{3} + 0.6 h x^{2} + 0.6 x h^{2} + 0.2 h^{3} + 4 x + 4 h + 4000$

Paso 2.2.2

Mueve $x$ .

$0.2 x^{3} + 0.6 h x^{2} + 0.6 h^{2} x + 0.2 h^{3} + 4 x + 4 h + 4000$

Paso 2.2.3

Mueve $4 x$ .

$0.2 x^{3} + 0.6 h x^{2} + 0.6 h^{2} x + 0.2 h^{3} + 4 h + 4 x + 4000$

Paso 2.2.4

Mueve $0.2 x^{3}$ .

$0.6 h x^{2} + 0.6 h^{2} x + 0.2 h^{3} + 0.2 x^{3} + 4 h + 4 x + 4000$

Paso 2.2.5

Mueve $0.6 h x^{2}$ .

$0.6 h^{2} x + 0.2 h^{3} + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000$

Paso 2.2.6

Reordena $0.6 h^{2} x$ y $0.2 h^{3}$ .

$0.2 h^{3} + 0.6 h^{2} x + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000$

Paso 2.3

Obtén los componentes de la definición.

$c (x + h) = 0.2 h^{3} + 0.6 h^{2} x + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000$

$c (x) = 0.2 x^{3} + 4 x + 4000$

$c (x + h) = 0.2 h^{3} + 0.6 h^{2} x + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000$

$c (x) = 0.2 x^{3} + 4 x + 4000$

Paso 3

Inserta los componentes.

$\frac{c (x + h) - c x}{h} = \frac{0.2 h^{3} + 0.6 h^{2} x + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4

Simplifica.

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Paso 4.1

Simplifica el numerador.

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Paso 4.1.1

Factoriza $0.2$ de $0.2 h^{3} + 0.6 h^{2} x + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)$ .

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Paso 4.1.1.1

Reordena la expresión.

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Paso 4.1.1.1.1

Mueve $h^{2}$ .

$\frac{0.2 h^{3} + 0.6 x h^{2} + 0.6 h x^{2} + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.1.2

Mueve $h$ .

$\frac{0.2 h^{3} + 0.6 x h^{2} + 0.6 x^{2} h + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.2

Factoriza $0.2$ de $0.2 h^{3}$ .

$\frac{0.2 h^{3} + 0.6 x h^{2} + 0.6 x^{2} h + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.3

Factoriza $0.2$ de $0.6 x h^{2}$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.6 x^{2} h + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.4

Factoriza $0.2$ de $0.6 x^{2} h$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 x^{3} + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.5

Factoriza $0.2$ de $0.2 x^{3}$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 4 h + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.6

Factoriza $0.2$ de $4 h$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 4 x + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.7

Factoriza $0.2$ de $4 x$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 4000 - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.8

Factoriza $0.2$ de $4000$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 0.2 (20000) - (0.2 x^{3} + 4 x + 4000)}{h}$

Paso 4.1.1.9

Factoriza $0.2$ de $- (0.2 x^{3} + 4 x + 4000)$ .

$\frac{0.2 h^{3} + 0.2 (3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.10

Factoriza $0.2$ de $0.2 h^{3} + 0.2 (3 x h^{2})$ .

$\frac{0.2 (h^{3} + 3 x h^{2}) + 0.2 (3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.11

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2}) + 0.2 (3 x^{2} h)$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h) + 0.2 (x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.12

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h) + 0.2 (x^{3})$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3}) + 0.2 (20 h) + 0.2 (20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.13

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3}) + 0.2 (20 h)$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h) + 0.2 (20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.14

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h) + 0.2 (20 x)$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x) + 0.2 (20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.15

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x) + 0.2 (20000)$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.1.16

Factoriza $0.2$ de $0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000) + 0.2 (- 5 (0.2 x^{3} + 4 x + 4000))$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - 5 (0.2 x^{3} + 4 x + 4000))}{h}$

Paso 4.1.2

Aplica la propiedad distributiva.

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - 5 (0.2 x^{3}) - 5 (4 x) - 5 \cdot 4000)}{h}$

Paso 4.1.3

Simplifica.

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Paso 4.1.3.1

Multiplica $0.2$ por $- 5$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - 1 x^{3} - 5 (4 x) - 5 \cdot 4000)}{h}$

Paso 4.1.3.2

Multiplica $4$ por $- 5$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - 1 x^{3} - 20 x - 5 \cdot 4000)}{h}$

Paso 4.1.3.3

Multiplica $- 5$ por $4000$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - 1 x^{3} - 20 x - 20000)}{h}$

Paso 4.1.4

Reescribe $- 1 x^{3}$ como $- x^{3}$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + x^{3} + 20 h + 20 x + 20000 - x^{3} - 20 x - 20000)}{h}$

Paso 4.1.5

Resta $x^{3}$ de $x^{3}$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h + 20 x + 20000 + 0 - 20 x - 20000)}{h}$

Paso 4.1.6

Suma $h^{3}$ y $0$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h + 20 x + 20000 - 20 x - 20000)}{h}$

Paso 4.1.7

Resta $20 x$ de $20 x$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h + 0 + 20000 - 20000)}{h}$

Paso 4.1.8

Suma $h^{3}$ y $0$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h + 20000 - 20000)}{h}$

Paso 4.1.9

Resta $20000$ de $20000$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h + 0)}{h}$

Paso 4.1.10

Suma $h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h$ y $0$ .

$\frac{0.2 (h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h)}{h}$

Paso 4.1.11

Factoriza $h$ de $h^{3} + 3 x h^{2} + 3 x^{2} h + 20 h$ .

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Paso 4.1.11.1

Factoriza $h$ de $h^{3}$ .

$\frac{0.2 (h \cdot h^{2} + 3 x h^{2} + 3 x^{2} h + 20 h)}{h}$

Paso 4.1.11.2

Factoriza $h$ de $3 x h^{2}$ .

$\frac{0.2 (h (h^{2}) + h (3 x h) + 3 x^{2} h + 20 h)}{h}$

Paso 4.1.11.3

Factoriza $h$ de $3 x^{2} h$ .

$\frac{0.2 (h (h^{2}) + h (3 x h) + h (3 x^{2}) + 20 h)}{h}$

Paso 4.1.11.4

Factoriza $h$ de $20 h$ .

$\frac{0.2 (h (h^{2}) + h (3 x h) + h (3 x^{2}) + h \cdot 20)}{h}$

Paso 4.1.11.5

Factoriza $h$ de $h (h^{2}) + h (3 x h)$ .

$\frac{0.2 (h (h^{2} + 3 x h) + h (3 x^{2}) + h \cdot 20)}{h}$

Paso 4.1.11.6

Factoriza $h$ de $h (h^{2} + 3 x h) + h (3 x^{2})$ .

$\frac{0.2 (h (h^{2} + 3 x h + 3 x^{2}) + h \cdot 20)}{h}$

Paso 4.1.11.7

Factoriza $h$ de $h (h^{2} + 3 x h + 3 x^{2}) + h \cdot 20$ .

$\frac{0.2 (h (h^{2} + 3 x h + 3 x^{2} + 20))}{h}$

$\frac{0.2 h (h^{2} + 3 x h + 3 x^{2} + 20)}{h}$

Paso 4.2

Simplifica los términos.

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Paso 4.2.1

Cancela el factor común de $h$ .

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Paso 4.2.1.1

Cancela el factor común.

$\frac{0.2 h (h^{2} + 3 x h + 3 x^{2} + 20)}{h}$

Paso 4.2.1.2

Divide $0.2 (h^{2} + 3 x h + 3 x^{2} + 20)$ por $1$ .

$0.2 (h^{2} + 3 x h + 3 x^{2} + 20)$

Paso 4.2.2

Aplica la propiedad distributiva.

$0.2 h^{2} + 0.2 (3 x h) + 0.2 (3 x^{2}) + 0.2 \cdot 20$

Paso 4.3

Simplifica.

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Paso 4.3.1

Multiplica $3$ por $0.2$ .

$0.2 h^{2} + 0.6 (x h) + 0.2 (3 x^{2}) + 0.2 \cdot 20$

Paso 4.3.2

Multiplica $3$ por $0.2$ .

$0.2 h^{2} + 0.6 (x h) + 0.6 x^{2} + 0.2 \cdot 20$

Paso 4.3.3

Multiplica $0.2$ por $20$ .

$0.2 h^{2} + 0.6 (x h) + 0.6 x^{2} + 4$

Paso 4.4

Mueve $0.2 h^{2}$ .

$0.6 x h + 0.6 x^{2} + 0.2 h^{2} + 4$

Paso 4.5

Reordena $0.6 x h$ y $0.6 x^{2}$ .

$0.6 x^{2} + 0.6 x h + 0.2 h^{2} + 4$

Paso 5