Calculus Examples

Solve the Differential Equation (1+x^3)dy-x^2(yd)x=0
Step 1
Add to both sides of the equation.
Step 2
Multiply both sides by .
Step 3
Simplify.
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Step 3.1
Cancel the common factor of .
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Step 3.1.1
Factor out of .
Step 3.1.2
Cancel the common factor.
Step 3.1.3
Rewrite the expression.
Step 3.2
Cancel the common factor of .
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Step 3.2.1
Factor out of .
Step 3.2.2
Factor out of .
Step 3.2.3
Cancel the common factor.
Step 3.2.4
Rewrite the expression.
Step 3.3
Combine and .
Step 3.4
Simplify the denominator.
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Step 3.4.1
Rewrite as .
Step 3.4.2
Since both terms are perfect cubes, factor using the sum of cubes formula, where and .
Step 3.4.3
Simplify.
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Step 3.4.3.1
One to any power is one.
Step 3.4.3.2
Rewrite as .
Step 4
Integrate both sides.
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Step 4.1
Set up an integral on each side.
Step 4.2
The integral of with respect to is .
Step 4.3
Integrate the right side.
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Step 4.3.1
Let . Then , so . Rewrite using and .
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Step 4.3.1.1
Let . Find .
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Step 4.3.1.1.1
Differentiate .
Step 4.3.1.1.2
Differentiate using the Product Rule which states that is where and .
Step 4.3.1.1.3
Differentiate.
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Step 4.3.1.1.3.1
By the Sum Rule, the derivative of with respect to is .
Step 4.3.1.1.3.2
Since is constant with respect to , the derivative of with respect to is .
Step 4.3.1.1.3.3
Add and .
Step 4.3.1.1.3.4
Since is constant with respect to , the derivative of with respect to is .
Step 4.3.1.1.3.5
Differentiate using the Power Rule which states that is where .
Step 4.3.1.1.3.6
Multiply by .
Step 4.3.1.1.3.7
Differentiate using the Power Rule which states that is where .
Step 4.3.1.1.3.8
By the Sum Rule, the derivative of with respect to is .
Step 4.3.1.1.3.9
Since is constant with respect to , the derivative of with respect to is .
Step 4.3.1.1.3.10
Add and .
Step 4.3.1.1.3.11
Differentiate using the Power Rule which states that is where .
Step 4.3.1.1.3.12
Multiply by .
Step 4.3.1.1.4
Simplify.
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Step 4.3.1.1.4.1
Apply the distributive property.
Step 4.3.1.1.4.2
Apply the distributive property.
Step 4.3.1.1.4.3
Apply the distributive property.
Step 4.3.1.1.4.4
Combine terms.
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Step 4.3.1.1.4.4.1
Multiply by .
Step 4.3.1.1.4.4.2
Move to the left of .
Step 4.3.1.1.4.4.3
Rewrite as .
Step 4.3.1.1.4.4.4
Multiply by .
Step 4.3.1.1.4.4.5
Raise to the power of .
Step 4.3.1.1.4.4.6
Raise to the power of .
Step 4.3.1.1.4.4.7
Use the power rule to combine exponents.
Step 4.3.1.1.4.4.8
Add and .
Step 4.3.1.1.4.4.9
Add and .
Step 4.3.1.1.4.4.10
Add and .
Step 4.3.1.1.4.4.11
Add and .
Step 4.3.1.1.4.4.12
Subtract from .
Step 4.3.1.1.4.4.13
Add and .
Step 4.3.1.1.4.4.14
Add and .
Step 4.3.1.2
Rewrite the problem using and .
Step 4.3.2
Simplify.
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Step 4.3.2.1
Multiply by .
Step 4.3.2.2
Move to the left of .
Step 4.3.3
Since is constant with respect to , move out of the integral.
Step 4.3.4
The integral of with respect to is .
Step 4.3.5
Simplify.
Step 4.3.6
Replace all occurrences of with .
Step 4.4
Group the constant of integration on the right side as .
Step 5
Solve for .
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Step 5.1
Simplify the right side.
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Step 5.1.1
Combine and .
Step 5.2
Move all the terms containing a logarithm to the left side of the equation.
Step 5.3
Simplify the numerator.
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Step 5.3.1
Expand by multiplying each term in the first expression by each term in the second expression.
Step 5.3.2
Simplify each term.
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Step 5.3.2.1
Multiply by .
Step 5.3.2.2
Multiply by .
Step 5.3.2.3
Multiply by .
Step 5.3.2.4
Multiply by .
Step 5.3.2.5
Rewrite using the commutative property of multiplication.
Step 5.3.2.6
Multiply by by adding the exponents.
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Step 5.3.2.6.1
Move .
Step 5.3.2.6.2
Multiply by .
Step 5.3.2.7
Multiply by by adding the exponents.
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Step 5.3.2.7.1
Multiply by .
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Step 5.3.2.7.1.1
Raise to the power of .
Step 5.3.2.7.1.2
Use the power rule to combine exponents.
Step 5.3.2.7.2
Add and .
Step 5.3.3
Combine the opposite terms in .
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Step 5.3.3.1
Add and .
Step 5.3.3.2
Add and .
Step 5.3.3.3
Subtract from .
Step 5.3.3.4
Add and .
Step 5.4
To write as a fraction with a common denominator, multiply by .
Step 5.5
Simplify terms.
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Step 5.5.1
Combine and .
Step 5.5.2
Combine the numerators over the common denominator.
Step 5.6
Move to the left of .
Step 5.7
Simplify the left side.
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Step 5.7.1
Simplify .
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Step 5.7.1.1
Simplify the numerator.
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Step 5.7.1.1.1
Simplify by moving inside the logarithm.
Step 5.7.1.1.2
Use the quotient property of logarithms, .
Step 5.7.1.1.3
Simplify the denominator.
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Step 5.7.1.1.3.1
Rewrite as .
Step 5.7.1.1.3.2
Since both terms are perfect cubes, factor using the sum of cubes formula, where and .
Step 5.7.1.1.3.3
Simplify.
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Step 5.7.1.1.3.3.1
One to any power is one.
Step 5.7.1.1.3.3.2
Rewrite as .
Step 5.7.1.1.3.4
Expand by multiplying each term in the first expression by each term in the second expression.
Step 5.7.1.1.3.5
Simplify each term.
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Step 5.7.1.1.3.5.1
Multiply by .
Step 5.7.1.1.3.5.2
Multiply by .
Step 5.7.1.1.3.5.3
Multiply by .
Step 5.7.1.1.3.5.4
Multiply by .
Step 5.7.1.1.3.5.5
Rewrite using the commutative property of multiplication.
Step 5.7.1.1.3.5.6
Multiply by by adding the exponents.
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Step 5.7.1.1.3.5.6.1
Move .
Step 5.7.1.1.3.5.6.2
Multiply by .
Step 5.7.1.1.3.5.7
Multiply by by adding the exponents.
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Step 5.7.1.1.3.5.7.1
Multiply by .
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Step 5.7.1.1.3.5.7.1.1
Raise to the power of .
Step 5.7.1.1.3.5.7.1.2
Use the power rule to combine exponents.
Step 5.7.1.1.3.5.7.2
Add and .
Step 5.7.1.1.3.6
Combine the opposite terms in .
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Step 5.7.1.1.3.6.1
Add and .
Step 5.7.1.1.3.6.2
Add and .
Step 5.7.1.1.3.6.3
Subtract from .
Step 5.7.1.1.3.6.4
Add and .
Step 5.7.1.1.3.7
Rewrite as .
Step 5.7.1.1.3.8
Since both terms are perfect cubes, factor using the sum of cubes formula, where and .
Step 5.7.1.1.3.9
Simplify.
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Step 5.7.1.1.3.9.1
One to any power is one.
Step 5.7.1.1.3.9.2
Rewrite as .
Step 5.7.1.2
Rewrite as .
Step 5.7.1.3
Simplify by moving inside the logarithm.
Step 5.7.1.4
Apply the product rule to .
Step 5.7.1.5
Simplify the numerator.
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Step 5.7.1.5.1
Multiply the exponents in .
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Step 5.7.1.5.1.1
Apply the power rule and multiply exponents, .
Step 5.7.1.5.1.2
Cancel the common factor of .
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Step 5.7.1.5.1.2.1
Cancel the common factor.
Step 5.7.1.5.1.2.2
Rewrite the expression.
Step 5.7.1.5.2
Simplify.
Step 5.7.1.6
Simplify the denominator.
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Step 5.7.1.6.1
Expand by multiplying each term in the first expression by each term in the second expression.
Step 5.7.1.6.2
Simplify each term.
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Step 5.7.1.6.2.1
Multiply by .
Step 5.7.1.6.2.2
Multiply by .
Step 5.7.1.6.2.3
Multiply by .
Step 5.7.1.6.2.4
Multiply by .
Step 5.7.1.6.2.5
Rewrite using the commutative property of multiplication.
Step 5.7.1.6.2.6
Multiply by by adding the exponents.
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Step 5.7.1.6.2.6.1
Move .
Step 5.7.1.6.2.6.2
Multiply by .
Step 5.7.1.6.2.7
Multiply by by adding the exponents.
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Step 5.7.1.6.2.7.1
Multiply by .
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Step 5.7.1.6.2.7.1.1
Raise to the power of .
Step 5.7.1.6.2.7.1.2
Use the power rule to combine exponents.
Step 5.7.1.6.2.7.2
Add and .
Step 5.7.1.6.3
Combine the opposite terms in .
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Step 5.7.1.6.3.1
Add and .
Step 5.7.1.6.3.2
Add and .
Step 5.7.1.6.3.3
Subtract from .
Step 5.7.1.6.3.4
Add and .
Step 5.8
To solve for , rewrite the equation using properties of logarithms.
Step 5.9
Rewrite in exponential form using the definition of a logarithm. If and are positive real numbers and , then is equivalent to .
Step 5.10
Solve for .
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Step 5.10.1
Rewrite the equation as .
Step 5.10.2
Multiply both sides by .
Step 5.10.3
Simplify the left side.
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Step 5.10.3.1
Cancel the common factor of .
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Step 5.10.3.1.1
Cancel the common factor.
Step 5.10.3.1.2
Rewrite the expression.
Step 5.10.4
Remove the absolute value term. This creates a on the right side of the equation because .
Step 6
Group the constant terms together.
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Step 6.1
Simplify the constant of integration.
Step 6.2
Combine constants with the plus or minus.