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Popular Calculus >

area 1/x ,x, x/4

Solution

area

\frac{1}{x}, x, \frac{x}{4}

Solution

2 ln (2)

+1

Decimal

1.38629 \dots

Solution steps

To find the intersection points solve

f_{i} (x) = f_{j} (x)

\frac{1}{x} = x : x = 1, x = - 1

\frac{1}{x} = \frac{x}{4} : x = 2, x = - 2

x = \frac{x}{4} : x = 0

= \int_{- 2}^{- 1} ∣ f_{1} (x) - f_{3} (x) ∣ d x + \int_{- 1}^{0} ∣ f_{3} (x) - f_{2} (x) ∣ d x + \int_{0}^{1} ∣ f_{2} (x) - f_{3} (x) ∣ d x + \int_{1}^{2} ∣ f_{1} (x) - f_{3} (x) ∣ d x

= \int_{- 2}^{- 1} \frac{1}{x} - \frac{x}{4} d x + \int_{- 1}^{0} \frac{x}{4} - x d x + \int_{0}^{1} x - \frac{x}{4} d x + \int_{1}^{2} \frac{1}{x} - \frac{x}{4} d x

\int_{- 2}^{- 1} \frac{1}{x} - \frac{x}{4} d x = ln (2) - \frac{3}{8}

\int_{- 1}^{0} \frac{x}{4} - x d x = \frac{3}{8}

\int_{0}^{1} x - \frac{x}{4} d x = \frac{3}{8}

\int_{1}^{2} \frac{1}{x} - \frac{x}{4} d x = ln (2) - \frac{3}{8}

= ln (2) - \frac{3}{8} + \frac{3}{8} + \frac{3}{8} + ln (2) - \frac{3}{8}

Simplify

= 2 ln (2)

Graph

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Frequently Asked Questions (FAQ)

What is area 1/x ,x, x/4 ?
The answer to area 1/x ,x, x/4 is 2ln(2)