Precalculus Examples

$4 \log (7) \cdot 3 + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1

Simplify each term.

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Step 1.1

Simplify $4 \log (7)$ by moving $4$ inside the logarithm.

$\log (7^{4}) \cdot 3 + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.2

Raise $7$ to the power of $4$ .

$\log (2401) \cdot 3 + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.3

Multiply $\log (2401) \cdot 3$ .

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Step 1.3.1

Reorder $\log (2401)$ and $3$ .

$3 \cdot \log (2401) + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.3.2

Simplify $3 \cdot \log (2401)$ by moving $3$ inside the logarithm.

$\log (2401^{3}) + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.4

Raise $2401$ to the power of $3$ .

$\log (13841287201) + \frac{1}{4} \cdot (\log (7) (r - 1)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.5

Apply the distributive property.

$\log (13841287201) + \frac{1}{4} \cdot (\log (7) r + \log (7) \cdot - 1) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.6

Move $- 1$ to the left of $\log (7)$ .

$\log (13841287201) + \frac{1}{4} \cdot (\log (7) r - 1 \cdot \log (7)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.7

Rewrite $- 1 \log (7)$ as $- \log (7)$ .

$\log (13841287201) + \frac{1}{4} \cdot (\log (7) r - \log (7)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.8

Apply the distributive property.

$\log (13841287201) + \frac{1}{4} (\log (7) r) + \frac{1}{4} (- \log (7)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.9

Multiply $\frac{1}{4} (\log (7) r)$ .

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Step 1.9.1

Reorder $\log (7)$ and $\frac{1}{4}$ .

$\log (13841287201) + \frac{1}{4} \log (7) r + \frac{1}{4} (- \log (7)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.9.2

Simplify $\frac{1}{4} \log (7)$ by moving $\frac{1}{4}$ inside the logarithm.

$\log (13841287201) + \log (7^{\frac{1}{4}}) r + \frac{1}{4} (- \log (7)) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.10

Simplify $\frac{1}{4} \log (7)$ by moving $\frac{1}{4}$ inside the logarithm.

$\log (13841287201) + \log (7^{\frac{1}{4}}) r - \log (7^{\frac{1}{4}}) - \frac{1}{2} \cdot (\log (7) r)$

Step 1.11

Multiply $- \frac{1}{2} (\log (7) r)$ .

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Step 1.11.1

Reorder $\log (7)$ and $\frac{1}{2}$ .

$\log (13841287201) + \log (7^{\frac{1}{4}}) r - \log (7^{\frac{1}{4}}) - (\frac{1}{2} \log (7)) r$

Step 1.11.2

Simplify $\frac{1}{2} \log (7)$ by moving $\frac{1}{2}$ inside the logarithm.

$\log (13841287201) + \log (7^{\frac{1}{4}}) r - \log (7^{\frac{1}{4}}) - \log (7^{\frac{1}{2}}) r$

Step 2

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

$\log (7^{\frac{1}{4}}) r + \log (\frac{13841287201}{7^{\frac{1}{4}}}) - \log (7^{\frac{1}{2}}) r$

Step 3

Reorder factors in $\log (7^{\frac{1}{4}}) r + \log (\frac{13841287201}{7^{\frac{1}{4}}}) - \log (7^{\frac{1}{2}}) r$ .

$r \log (7^{\frac{1}{4}}) + \log (\frac{13841287201}{7^{\frac{1}{4}}}) - r \log (7^{\frac{1}{2}})$