Calculus Examples

$\frac{1}{3} (\log_{8} (y + 2) + \log_{8} (y + 4)) - \log_{8} (y - 1)$

Step 1

Simplify each term.

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Step 1.1

Use the product property of logarithms, $\log_{b} (x) + \log_{b} (y) = \log_{b} (x y)$ .

$\frac{1}{3} \cdot \log_{8} ((y + 2) (y + 4)) - \log_{8} (y - 1)$

Step 1.2

Expand $(y + 2) (y + 4)$ using the FOIL Method.

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Step 1.2.1

Apply the distributive property.

$\frac{1}{3} \cdot \log_{8} (y (y + 4) + 2 (y + 4)) - \log_{8} (y - 1)$

Step 1.2.2

Apply the distributive property.

$\frac{1}{3} \cdot \log_{8} (y \cdot y + y \cdot 4 + 2 (y + 4)) - \log_{8} (y - 1)$

Step 1.2.3

Apply the distributive property.

$\frac{1}{3} \cdot \log_{8} (y \cdot y + y \cdot 4 + 2 y + 2 \cdot 4) - \log_{8} (y - 1)$

Step 1.3

Simplify and combine like terms.

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Step 1.3.1

Simplify each term.

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Step 1.3.1.1

Multiply $y$ by $y$ .

$\frac{1}{3} \cdot \log_{8} (y^{2} + y \cdot 4 + 2 y + 2 \cdot 4) - \log_{8} (y - 1)$

Step 1.3.1.2

Move $4$ to the left of $y$ .

$\frac{1}{3} \cdot \log_{8} (y^{2} + 4 \cdot y + 2 y + 2 \cdot 4) - \log_{8} (y - 1)$

Step 1.3.1.3

Multiply $2$ by $4$ .

$\frac{1}{3} \cdot \log_{8} (y^{2} + 4 y + 2 y + 8) - \log_{8} (y - 1)$

Step 1.3.2

Add $4 y$ and $2 y$ .

$\frac{1}{3} \cdot \log_{8} (y^{2} + 6 y + 8) - \log_{8} (y - 1)$

Step 1.4

Simplify $\frac{1}{3} \log_{8} (y^{2} + 6 y + 8)$ by moving $\frac{1}{3}$ inside the logarithm.

$\log_{8} ({(y^{2} + 6 y + 8)}^{\frac{1}{3}}) - \log_{8} (y - 1)$

Step 2

Use the quotient property of logarithms, $\log_{b} (x) - \log_{b} (y) = \log_{b} (\frac{x}{y})$ .

$\log_{8} (\frac{{(y^{2} + 6 y + 8)}^{\frac{1}{3}}}{y - 1})$