Calculus Examples

Find the Domain ( square root of 3-x)/( square root of x^2-1)
Step 1
Set the radicand in greater than or equal to to find where the expression is defined.
Step 2
Solve for .
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Step 2.1
Subtract from both sides of the inequality.
Step 2.2
Divide each term in by and simplify.
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Step 2.2.1
Divide each term in by . When multiplying or dividing both sides of an inequality by a negative value, flip the direction of the inequality sign.
Step 2.2.2
Simplify the left side.
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Step 2.2.2.1
Dividing two negative values results in a positive value.
Step 2.2.2.2
Divide by .
Step 2.2.3
Simplify the right side.
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Step 2.2.3.1
Divide by .
Step 3
Set the radicand in greater than or equal to to find where the expression is defined.
Step 4
Solve for .
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Step 4.1
Add to both sides of the inequality.
Step 4.2
Take the specified root of both sides of the inequality to eliminate the exponent on the left side.
Step 4.3
Simplify the equation.
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Step 4.3.1
Simplify the left side.
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Step 4.3.1.1
Pull terms out from under the radical.
Step 4.3.2
Simplify the right side.
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Step 4.3.2.1
Any root of is .
Step 4.4
Write as a piecewise.
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Step 4.4.1
To find the interval for the first piece, find where the inside of the absolute value is non-negative.
Step 4.4.2
In the piece where is non-negative, remove the absolute value.
Step 4.4.3
To find the interval for the second piece, find where the inside of the absolute value is negative.
Step 4.4.4
In the piece where is negative, remove the absolute value and multiply by .
Step 4.4.5
Write as a piecewise.
Step 4.5
Find the intersection of and .
Step 4.6
Divide each term in by and simplify.
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Step 4.6.1
Divide each term in by . When multiplying or dividing both sides of an inequality by a negative value, flip the direction of the inequality sign.
Step 4.6.2
Simplify the left side.
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Step 4.6.2.1
Dividing two negative values results in a positive value.
Step 4.6.2.2
Divide by .
Step 4.6.3
Simplify the right side.
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Step 4.6.3.1
Divide by .
Step 4.7
Find the union of the solutions.
or
or
Step 5
Set the denominator in equal to to find where the expression is undefined.
Step 6
Solve for .
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Step 6.1
To remove the radical on the left side of the equation, square both sides of the equation.
Step 6.2
Simplify each side of the equation.
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Step 6.2.1
Use to rewrite as .
Step 6.2.2
Simplify the left side.
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Step 6.2.2.1
Simplify .
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Step 6.2.2.1.1
Multiply the exponents in .
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Step 6.2.2.1.1.1
Apply the power rule and multiply exponents, .
Step 6.2.2.1.1.2
Cancel the common factor of .
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Step 6.2.2.1.1.2.1
Cancel the common factor.
Step 6.2.2.1.1.2.2
Rewrite the expression.
Step 6.2.2.1.2
Simplify.
Step 6.2.3
Simplify the right side.
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Step 6.2.3.1
Raising to any positive power yields .
Step 6.3
Solve for .
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Step 6.3.1
Add to both sides of the equation.
Step 6.3.2
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
Step 6.3.3
Any root of is .
Step 6.3.4
The complete solution is the result of both the positive and negative portions of the solution.
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Step 6.3.4.1
First, use the positive value of the to find the first solution.
Step 6.3.4.2
Next, use the negative value of the to find the second solution.
Step 6.3.4.3
The complete solution is the result of both the positive and negative portions of the solution.
Step 7
The domain is all values of that make the expression defined.
Interval Notation:
Set-Builder Notation:
Step 8