Calculus Examples

$y = \ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})$

Step 1

Multiply the equation by $5 x^{4} - 1$ .

$(5 x^{4} - 1) (y) = (\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})) (5 x^{4} - 1)$

Step 2

Simplify the left side.

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Step 2.1

Simplify $(5 x^{4} - 1) (y)$ .

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Step 2.1.1

Apply the distributive property.

$5 x^{4} y - 1 y = (\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})) (5 x^{4} - 1)$

Step 2.1.2

Rewrite $- 1 y$ as $- y$ .

$5 x^{4} y - y = (\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})) (5 x^{4} - 1)$

Step 3

Simplify the right side.

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Step 3.1

Simplify $(\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})) (5 x^{4} - 1)$ .

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Step 3.1.1

Simplify by multiplying through.

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Step 3.1.1.1

Apply the product rule to $\frac{x^{2}}{5 x^{4} - 1}$ .

$5 x^{4} y - y = \ln (\frac{{(x^{2})}^{3}}{{(5 x^{4} - 1)}^{3}}) (5 x^{4} - 1)$

Step 3.1.1.2

Multiply the exponents in ${(x^{2})}^{3}$ .

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Step 3.1.1.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$5 x^{4} y - y = \ln (\frac{x^{2 \cdot 3}}{{(5 x^{4} - 1)}^{3}}) (5 x^{4} - 1)$

Step 3.1.1.2.2

Multiply $2$ by $3$ .

$5 x^{4} y - y = \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) (5 x^{4} - 1)$

Step 3.1.1.3

Apply the distributive property.

$5 x^{4} y - y = \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) (5 x^{4}) + \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) \cdot - 1$

Step 3.1.1.4

Reorder.

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Step 3.1.1.4.1

Rewrite using the commutative property of multiplication.

$5 x^{4} y - y = 5 \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) x^{4} + \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) \cdot - 1$

Step 3.1.1.4.2

Move $- 1$ to the left of $\ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$ .

$5 x^{4} y - y = 5 \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2

Simplify each term.

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Step 3.1.2.1

Simplify $5 \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$ by moving $5$ inside the logarithm.

$5 x^{4} y - y = \ln ({(\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})}^{5}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.2

Apply the product rule to $\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}$ .

$5 x^{4} y - y = \ln (\frac{{(x^{6})}^{5}}{{({(5 x^{4} - 1)}^{3})}^{5}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.3

Multiply the exponents in ${(x^{6})}^{5}$ .

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Step 3.1.2.3.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$5 x^{4} y - y = \ln (\frac{x^{6 \cdot 5}}{{({(5 x^{4} - 1)}^{3})}^{5}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.3.2

Multiply $6$ by $5$ .

$5 x^{4} y - y = \ln (\frac{x^{30}}{{({(5 x^{4} - 1)}^{3})}^{5}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.4

Multiply the exponents in ${({(5 x^{4} - 1)}^{3})}^{5}$ .

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Step 3.1.2.4.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$5 x^{4} y - y = \ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{3 \cdot 5}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.4.2

Multiply $3$ by $5$ .

$5 x^{4} y - y = \ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{15}}) x^{4} - 1 \cdot \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.2.5

Rewrite $- 1 \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$ as $- \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$ .

$5 x^{4} y - y = \ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{15}}) x^{4} - \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 3.1.3

Reorder factors in $\ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{15}}) x^{4} - \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$ .

$5 x^{4} y - y = x^{4} \ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{15}}) - \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}})$

Step 4

Move all the terms containing a logarithm to the left side of the equation.

$- x^{4} \ln (\frac{x^{30}}{{(5 x^{4} - 1)}^{15}}) + \ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) = - 5 x^{4} y + y$

Step 5

Rewrite the equation as $\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3}) = y$ .

$\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3}) = y$

Step 6

Simplify $\ln ({(\frac{x^{2}}{5 x^{4} - 1})}^{3})$ .

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Step 6.1

Apply the product rule to $\frac{x^{2}}{5 x^{4} - 1}$ .

$\ln (\frac{{(x^{2})}^{3}}{{(5 x^{4} - 1)}^{3}}) = y$

Step 6.2

Multiply the exponents in ${(x^{2})}^{3}$ .

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Step 6.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\ln (\frac{x^{2 \cdot 3}}{{(5 x^{4} - 1)}^{3}}) = y$

Step 6.2.2

Multiply $2$ by $3$ .

$\ln (\frac{x^{6}}{{(5 x^{4} - 1)}^{3}}) = y$