Evaluate 4/( cube root of 7)

$\frac{4}{\sqrt[3]{7}}$

Step 1

Multiply $\frac{4}{\sqrt[3]{7}}$ by $\frac{{\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{2}}$ .

$\frac{4}{\sqrt[3]{7}} \cdot \frac{{\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{2}}$

Step 2

Combine and simplify the denominator.

Multiply $\frac{4}{\sqrt[3]{7}}$ by $\frac{{\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{2}}$ .

$\frac{4 {\sqrt[3]{7}}^{2}}{\sqrt[3]{7} {\sqrt[3]{7}}^{2}}$

Raise $\sqrt[3]{7}$ to the power of $1$ .

$\frac{4 {\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{1} {\sqrt[3]{7}}^{2}}$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{4 {\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{1 + 2}}$

Add $1$ and $2$ .

$\frac{4 {\sqrt[3]{7}}^{2}}{{\sqrt[3]{7}}^{3}}$

Rewrite ${\sqrt[3]{7}}^{3}$ as $7$ .

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{7}$ as $7^{\frac{1}{3}}$ .

$\frac{4 {\sqrt[3]{7}}^{2}}{{(7^{\frac{1}{3}})}^{3}}$

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

$\frac{4 {\sqrt[3]{7}}^{2}}{7^{\frac{1}{3} \cdot 3}}$

Combine $\frac{1}{3}$ and $3$ .

$\frac{4 {\sqrt[3]{7}}^{2}}{7^{\frac{3}{3}}}$

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{4 {\sqrt[3]{7}}^{2}}{7^{\frac{3}{3}}}$

Rewrite the expression.

$\frac{4 {\sqrt[3]{7}}^{2}}{7^{1}}$

Evaluate the exponent.

$\frac{4 {\sqrt[3]{7}}^{2}}{7}$

Step 3

Simplify the numerator.

Rewrite ${\sqrt[3]{7}}^{2}$ as $\sqrt[3]{7^{2}}$ .

$\frac{4 \sqrt[3]{7^{2}}}{7}$

Raise $7$ to the power of $2$ .

$\frac{4 \sqrt[3]{49}}{7}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$\frac{4 \sqrt[3]{49}}{7}$

Decimal Form:

$2.09103183 \dots$