Calculus Examples

Evaluate the Integral integral of square root of 8-3x^2 with respect to x
Step 1
Let , where . Then . Note that since , is positive.
Step 2
Simplify terms.
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Step 2.1
Simplify .
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Step 2.1.1
Simplify each term.
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Step 2.1.1.1
Apply the product rule to .
Step 2.1.1.2
Raise to the power of .
Step 2.1.1.3
Rewrite as .
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Step 2.1.1.3.1
Use to rewrite as .
Step 2.1.1.3.2
Apply the power rule and multiply exponents, .
Step 2.1.1.3.3
Combine and .
Step 2.1.1.3.4
Cancel the common factor of .
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Step 2.1.1.3.4.1
Cancel the common factor.
Step 2.1.1.3.4.2
Rewrite the expression.
Step 2.1.1.3.5
Evaluate the exponent.
Step 2.1.1.4
Multiply by .
Step 2.1.1.5
Multiply by .
Step 2.1.1.6
Combine and simplify the denominator.
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Step 2.1.1.6.1
Multiply by .
Step 2.1.1.6.2
Raise to the power of .
Step 2.1.1.6.3
Raise to the power of .
Step 2.1.1.6.4
Use the power rule to combine exponents.
Step 2.1.1.6.5
Add and .
Step 2.1.1.6.6
Rewrite as .
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Step 2.1.1.6.6.1
Use to rewrite as .
Step 2.1.1.6.6.2
Apply the power rule and multiply exponents, .
Step 2.1.1.6.6.3
Combine and .
Step 2.1.1.6.6.4
Cancel the common factor of .
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Step 2.1.1.6.6.4.1
Cancel the common factor.
Step 2.1.1.6.6.4.2
Rewrite the expression.
Step 2.1.1.6.6.5
Evaluate the exponent.
Step 2.1.1.7
Simplify the numerator.
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Step 2.1.1.7.1
Combine using the product rule for radicals.
Step 2.1.1.7.2
Multiply by .
Step 2.1.1.8
Combine and .
Step 2.1.1.9
Use the power rule to distribute the exponent.
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Step 2.1.1.9.1
Apply the product rule to .
Step 2.1.1.9.2
Apply the product rule to .
Step 2.1.1.9.3
Apply the product rule to .
Step 2.1.1.10
Simplify the numerator.
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Step 2.1.1.10.1
Raise to the power of .
Step 2.1.1.10.2
Rewrite as .
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Step 2.1.1.10.2.1
Use to rewrite as .
Step 2.1.1.10.2.2
Apply the power rule and multiply exponents, .
Step 2.1.1.10.2.3
Combine and .
Step 2.1.1.10.2.4
Cancel the common factor of .
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Step 2.1.1.10.2.4.1
Cancel the common factor.
Step 2.1.1.10.2.4.2
Rewrite the expression.
Step 2.1.1.10.2.5
Evaluate the exponent.
Step 2.1.1.10.3
Multiply by .
Step 2.1.1.11
Raise to the power of .
Step 2.1.1.12
Cancel the common factor of .
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Step 2.1.1.12.1
Factor out of .
Step 2.1.1.12.2
Factor out of .
Step 2.1.1.12.3
Cancel the common factor.
Step 2.1.1.12.4
Rewrite the expression.
Step 2.1.1.13
Cancel the common factor of and .
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Step 2.1.1.13.1
Factor out of .
Step 2.1.1.13.2
Cancel the common factors.
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Step 2.1.1.13.2.1
Factor out of .
Step 2.1.1.13.2.2
Cancel the common factor.
Step 2.1.1.13.2.3
Rewrite the expression.
Step 2.1.1.13.2.4
Divide by .
Step 2.1.1.14
Multiply by .
Step 2.1.2
Factor out of .
Step 2.1.3
Factor out of .
Step 2.1.4
Factor out of .
Step 2.1.5
Apply pythagorean identity.
Step 2.1.6
Rewrite as .
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Step 2.1.6.1
Factor out of .
Step 2.1.6.2
Rewrite as .
Step 2.1.6.3
Move .
Step 2.1.6.4
Rewrite as .
Step 2.1.7
Pull terms out from under the radical.
Step 2.2
Simplify.
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Step 2.2.1
Combine and .
Step 2.2.2
Multiply by .
Step 2.2.3
Combine and .
Step 2.2.4
Raise to the power of .
Step 2.2.5
Raise to the power of .
Step 2.2.6
Use the power rule to combine exponents.
Step 2.2.7
Add and .
Step 2.2.8
Combine and .
Step 2.2.9
Combine using the product rule for radicals.
Step 2.2.10
Multiply by .
Step 3
Since is constant with respect to , move out of the integral.
Step 4
Use the half-angle formula to rewrite as .
Step 5
Since is constant with respect to , move out of the integral.
Step 6
Simplify.
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Step 6.1
Multiply by .
Step 6.2
Multiply by .
Step 6.3
Cancel the common factor of and .
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Step 6.3.1
Factor out of .
Step 6.3.2
Cancel the common factors.
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Step 6.3.2.1
Factor out of .
Step 6.3.2.2
Cancel the common factor.
Step 6.3.2.3
Rewrite the expression.
Step 7
Split the single integral into multiple integrals.
Step 8
Apply the constant rule.
Step 9
Let . Then , so . Rewrite using and .
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Step 9.1
Let . Find .
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Step 9.1.1
Differentiate .
Step 9.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 9.1.3
Differentiate using the Power Rule which states that is where .
Step 9.1.4
Multiply by .
Step 9.2
Rewrite the problem using and .
Step 10
Combine and .
Step 11
Since is constant with respect to , move out of the integral.
Step 12
The integral of with respect to is .
Step 13
Simplify.
Step 14
Substitute back in for each integration substitution variable.
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Step 14.1
Replace all occurrences of with .
Step 14.2
Replace all occurrences of with .
Step 14.3
Replace all occurrences of with .
Step 15
Simplify.
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Step 15.1
Simplify each term.
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Step 15.1.1
Multiply by .
Step 15.1.2
Combine and simplify the denominator.
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Step 15.1.2.1
Multiply by .
Step 15.1.2.2
Move .
Step 15.1.2.3
Raise to the power of .
Step 15.1.2.4
Raise to the power of .
Step 15.1.2.5
Use the power rule to combine exponents.
Step 15.1.2.6
Add and .
Step 15.1.2.7
Rewrite as .
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Step 15.1.2.7.1
Use to rewrite as .
Step 15.1.2.7.2
Apply the power rule and multiply exponents, .
Step 15.1.2.7.3
Combine and .
Step 15.1.2.7.4
Cancel the common factor of .
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Step 15.1.2.7.4.1
Cancel the common factor.
Step 15.1.2.7.4.2
Rewrite the expression.
Step 15.1.2.7.5
Evaluate the exponent.
Step 15.1.3
Simplify the numerator.
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Step 15.1.3.1
Combine using the product rule for radicals.
Step 15.1.3.2
Multiply by .
Step 15.1.4
Multiply by .
Step 15.1.5
Combine and .
Step 15.2
Apply the distributive property.
Step 15.3
Combine and .
Step 15.4
Cancel the common factor of .
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Step 15.4.1
Factor out of .
Step 15.4.2
Cancel the common factor.
Step 15.4.3
Rewrite the expression.
Step 15.5
Combine and .
Step 16
Simplify.
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Step 16.1
Multiply by .
Step 16.2
Combine and simplify the denominator.
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Step 16.2.1
Multiply by .
Step 16.2.2
Move .
Step 16.2.3
Raise to the power of .
Step 16.2.4
Raise to the power of .
Step 16.2.5
Use the power rule to combine exponents.
Step 16.2.6
Add and .
Step 16.2.7
Rewrite as .
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Step 16.2.7.1
Use to rewrite as .
Step 16.2.7.2
Apply the power rule and multiply exponents, .
Step 16.2.7.3
Combine and .
Step 16.2.7.4
Cancel the common factor of .
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Step 16.2.7.4.1
Cancel the common factor.
Step 16.2.7.4.2
Rewrite the expression.
Step 16.2.7.5
Evaluate the exponent.
Step 16.3
Simplify the numerator.
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Step 16.3.1
Combine using the product rule for radicals.
Step 16.3.2
Multiply by .
Step 16.4
Multiply by .
Step 16.5
Reorder terms.