Rational Exponents
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Pre-Calculus › Rational Exponents
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,
Solve:
Explanation
To remove the rational exponent, cube both sides of the equation:
Now simplify both sides of the equation:
Solve:
Explanation
To remove the rational exponent, cube both sides of the equation:
Now simplify both sides of the equation:
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,
Simplify
Explanation
.
Simplify
Explanation
.
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
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
:
Solve:
Explanation
To remove the fractional exponents, raise both sides to the second power and simplify:
Now solve for :
Simplify the function:
Explanation
When an exponent is raised to the power of another exponent, just multiply the exponents together.