Rational Exponents

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Pre-Calculus › Rational Exponents

Questions 1 - 10
1

Evaluate when

Explanation

Remember the denominator of a rational exponent is equivalent to the index of a root.

This should simplify quite nicely.

When it gives us,

2

Solve:

Explanation

To remove the rational exponent, cube both sides of the equation:

Now simplify both sides of the equation:

3

Solve:

Explanation

To remove the rational exponent, cube both sides of the equation:

Now simplify both sides of the equation:

4

Evaluate when

Explanation

Remember the denominator of a rational exponent is equivalent to the index of a root.

This should simplify quite nicely.

When it gives us,

5

Simplify

Explanation

.

6

Simplify

Explanation

.

7

Solve for .

Explanation

We begin by factoring out the term to get:

This equation gives our first solution:

Then we check for more solutions:

Therefore our solution is

8

Simplify and rewrite with positive exponents:

Explanation

When dividing two exponents with the same base we subtract the exponents:

Negative exponents are dealt with based on the rule

:

9

Solve:

Explanation

To remove the fractional exponents, raise both sides to the second power and simplify:

Now solve for :

10

Simplify the function:

Explanation

When an exponent is raised to the power of another exponent, just multiply the exponents together.

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