Calculus Examples

Solve the Differential Equation (dy)/(dx)=(x^2)/(y(1+x^3))
Step 1
Separate the variables.
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Step 1.1
Regroup factors.
Step 1.2
Multiply both sides by .
Step 1.3
Simplify.
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Step 1.3.1
Simplify the denominator.
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Step 1.3.1.1
Rewrite as .
Step 1.3.1.2
Since both terms are perfect cubes, factor using the sum of cubes formula, where and .
Step 1.3.1.3
Simplify.
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Step 1.3.1.3.1
One to any power is one.
Step 1.3.1.3.2
Rewrite as .
Step 1.3.2
Combine.
Step 1.3.3
Cancel the common factor of .
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Step 1.3.3.1
Factor out of .
Step 1.3.3.2
Cancel the common factor.
Step 1.3.3.3
Rewrite the expression.
Step 1.3.4
Multiply by .
Step 1.4
Rewrite the equation.
Step 2
Integrate both sides.
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Step 2.1
Set up an integral on each side.
Step 2.2
By the Power Rule, the integral of with respect to is .
Step 2.3
Integrate the right side.
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Step 2.3.1
Let . Then , so . Rewrite using and .
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Step 2.3.1.1
Let . Find .
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Step 2.3.1.1.1
Differentiate .
Step 2.3.1.1.2
Differentiate using the Product Rule which states that is where and .
Step 2.3.1.1.3
Differentiate.
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Step 2.3.1.1.3.1
By the Sum Rule, the derivative of with respect to is .
Step 2.3.1.1.3.2
Since is constant with respect to , the derivative of with respect to is .
Step 2.3.1.1.3.3
Add and .
Step 2.3.1.1.3.4
Since is constant with respect to , the derivative of with respect to is .
Step 2.3.1.1.3.5
Differentiate using the Power Rule which states that is where .
Step 2.3.1.1.3.6
Multiply by .
Step 2.3.1.1.3.7
Differentiate using the Power Rule which states that is where .
Step 2.3.1.1.3.8
By the Sum Rule, the derivative of with respect to is .
Step 2.3.1.1.3.9
Since is constant with respect to , the derivative of with respect to is .
Step 2.3.1.1.3.10
Add and .
Step 2.3.1.1.3.11
Differentiate using the Power Rule which states that is where .
Step 2.3.1.1.3.12
Multiply by .
Step 2.3.1.1.4
Simplify.
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Step 2.3.1.1.4.1
Apply the distributive property.
Step 2.3.1.1.4.2
Apply the distributive property.
Step 2.3.1.1.4.3
Apply the distributive property.
Step 2.3.1.1.4.4
Combine terms.
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Step 2.3.1.1.4.4.1
Multiply by .
Step 2.3.1.1.4.4.2
Move to the left of .
Step 2.3.1.1.4.4.3
Rewrite as .
Step 2.3.1.1.4.4.4
Multiply by .
Step 2.3.1.1.4.4.5
Raise to the power of .
Step 2.3.1.1.4.4.6
Raise to the power of .
Step 2.3.1.1.4.4.7
Use the power rule to combine exponents.
Step 2.3.1.1.4.4.8
Add and .
Step 2.3.1.1.4.4.9
Add and .
Step 2.3.1.1.4.4.10
Add and .
Step 2.3.1.1.4.4.11
Add and .
Step 2.3.1.1.4.4.12
Subtract from .
Step 2.3.1.1.4.4.13
Add and .
Step 2.3.1.1.4.4.14
Add and .
Step 2.3.1.2
Rewrite the problem using and .
Step 2.3.2
Simplify.
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Step 2.3.2.1
Multiply by .
Step 2.3.2.2
Move to the left of .
Step 2.3.3
Since is constant with respect to , move out of the integral.
Step 2.3.4
The integral of with respect to is .
Step 2.3.5
Simplify.
Step 2.3.6
Replace all occurrences of with .
Step 2.4
Group the constant of integration on the right side as .
Step 3
Solve for .
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Step 3.1
Multiply both sides of the equation by .
Step 3.2
Simplify both sides of the equation.
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Step 3.2.1
Simplify the left side.
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Step 3.2.1.1
Simplify .
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Step 3.2.1.1.1
Combine and .
Step 3.2.1.1.2
Cancel the common factor of .
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Step 3.2.1.1.2.1
Cancel the common factor.
Step 3.2.1.1.2.2
Rewrite the expression.
Step 3.2.2
Simplify the right side.
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Step 3.2.2.1
Simplify .
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Step 3.2.2.1.1
Simplify each term.
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Step 3.2.2.1.1.1
Expand by multiplying each term in the first expression by each term in the second expression.
Step 3.2.2.1.1.2
Simplify each term.
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Step 3.2.2.1.1.2.1
Multiply by .
Step 3.2.2.1.1.2.2
Multiply by .
Step 3.2.2.1.1.2.3
Multiply by .
Step 3.2.2.1.1.2.4
Multiply by .
Step 3.2.2.1.1.2.5
Rewrite using the commutative property of multiplication.
Step 3.2.2.1.1.2.6
Multiply by by adding the exponents.
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Step 3.2.2.1.1.2.6.1
Move .
Step 3.2.2.1.1.2.6.2
Multiply by .
Step 3.2.2.1.1.2.7
Multiply by by adding the exponents.
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Step 3.2.2.1.1.2.7.1
Multiply by .
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Step 3.2.2.1.1.2.7.1.1
Raise to the power of .
Step 3.2.2.1.1.2.7.1.2
Use the power rule to combine exponents.
Step 3.2.2.1.1.2.7.2
Add and .
Step 3.2.2.1.1.3
Combine the opposite terms in .
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Step 3.2.2.1.1.3.1
Add and .
Step 3.2.2.1.1.3.2
Add and .
Step 3.2.2.1.1.3.3
Subtract from .
Step 3.2.2.1.1.3.4
Add and .
Step 3.2.2.1.1.4
Combine and .
Step 3.2.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 3.2.2.1.3
Simplify terms.
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Step 3.2.2.1.3.1
Combine and .
Step 3.2.2.1.3.2
Combine the numerators over the common denominator.
Step 3.2.2.1.4
Move to the left of .
Step 3.2.2.1.5
Combine and .
Step 3.3
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
Step 3.4
Simplify .
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Step 3.4.1
Rewrite as .
Step 3.4.2
Multiply by .
Step 3.4.3
Combine and simplify the denominator.
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Step 3.4.3.1
Multiply by .
Step 3.4.3.2
Raise to the power of .
Step 3.4.3.3
Raise to the power of .
Step 3.4.3.4
Use the power rule to combine exponents.
Step 3.4.3.5
Add and .
Step 3.4.3.6
Rewrite as .
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Step 3.4.3.6.1
Use to rewrite as .
Step 3.4.3.6.2
Apply the power rule and multiply exponents, .
Step 3.4.3.6.3
Combine and .
Step 3.4.3.6.4
Cancel the common factor of .
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Step 3.4.3.6.4.1
Cancel the common factor.
Step 3.4.3.6.4.2
Rewrite the expression.
Step 3.4.3.6.5
Evaluate the exponent.
Step 3.4.4
Simplify the numerator.
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Step 3.4.4.1
Combine using the product rule for radicals.
Step 3.4.4.2
Multiply by .
Step 3.5
The complete solution is the result of both the positive and negative portions of the solution.
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Step 3.5.1
First, use the positive value of the to find the first solution.
Step 3.5.2
Next, use the negative value of the to find the second solution.
Step 3.5.3
The complete solution is the result of both the positive and negative portions of the solution.
Step 4
Simplify the constant of integration.