Write each of the following expressions in simplified exponential form.

a. StartRoot x cubed EndRoot
b. RootIndex 7 StartRoot x cubed EndRoot
c. RootIndex 8 StartRoot x cubed EndRoot
d. RootIndex 15 StartRoot 27 y Superscript 12 EndRoot
e. 27 RootIndex 15 StartRoot y Superscript 12 EndRoot
Question content area bottom
Part 1
a. StartRoot x cubed EndRootequals
  
enter your response here
​(Simplify your answer. Type your answer using exponential​ notation.)
Part 2
b. RootIndex 7 StartRoot x cubed EndRootequals
  
enter your response here
​(Simplify your answer. Type your answer using exponential​ notation.)
Part 3
c. RootIndex 8 StartRoot x cubed EndRootequals
  
enter your response here
​(Simplify your answer. Type your answer using exponential​ notation.)
Part 4
d. RootIndex 15 StartRoot 27 y Superscript 12 EndRootequals
  
enter your response here
​(Simplify your answer. Type your answer using exponential​ notation.)
Part 5
e. 27 RootIndex 15 StartRoot y Superscript 12 EndRootequals
  
enter your response here
​(Simplify your answer. Type your answer using exponential​ notation.)

1 answer

To rewrite each expression in simplified exponential form, we can use the property of exponents that states \(\sqrt[n]{a^m} = a^{m/n}\).

Let's simplify each expression one by one:

Part 1

a. \(\sqrt{x^3}\)

\[ \sqrt{x^3} = x^{3/2} \]

Part 2

b. \(\sqrt[7]{x^3}\)

\[ \sqrt[7]{x^3} = x^{3/7} \]

Part 3

c. \(\sqrt[8]{x^3}\)

\[ \sqrt[8]{x^3} = x^{3/8} \]

Part 4

d. \(\sqrt[15]{27y^{12}}\)

First, express \(27\) as \(3^3\):

\[ \sqrt[15]{27y^{12}} = \sqrt[15]{3^3 \cdot y^{12}} = \sqrt[15]{3^3} \cdot \sqrt[15]{y^{12}} = 3^{3/15} \cdot y^{12/15} = 3^{1/5} \cdot y^{4/5} \]

Part 5

e. \(27\sqrt[15]{y^{12}}\)

Again, express \(27\) as \(3^3\):

\[ 27\sqrt[15]{y^{12}} = 3^3 \cdot \sqrt[15]{y^{12}} = 3^3 \cdot y^{12/15} = 3^3 \cdot y^{4/5} = 27 \cdot y^{4/5} \]

Summary of Answers

  • Part 1: \(x^{3/2}\)
  • Part 2: \(x^{3/7}\)
  • Part 3: \(x^{3/8}\)
  • Part 4: \(3^{1/5} y^{4/5}\)
  • Part 5: \(27y^{4/5}\)

These are the simplified exponential forms for each expression.