Calculus Examples

Solve the Differential Equation (dy)/(dx)=(x^2y^3)/(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
Cancel the common factor of .
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Step 1.3.1
Factor out of .
Step 1.3.2
Cancel the common factor.
Step 1.3.3
Rewrite the expression.
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
Integrate the left side.
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Step 2.2.1
Apply basic rules of exponents.
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Step 2.2.1.1
Move out of the denominator by raising it to the power.
Step 2.2.1.2
Multiply the exponents in .
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Step 2.2.1.2.1
Apply the power rule and multiply exponents, .
Step 2.2.1.2.2
Multiply by .
Step 2.2.2
By the Power Rule, the integral of with respect to is .
Step 2.2.3
Simplify the answer.
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Step 2.2.3.1
Rewrite as .
Step 2.2.3.2
Simplify.
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Step 2.2.3.2.1
Multiply by .
Step 2.2.3.2.2
Move to the left of .
Step 2.3
Integrate the right side.
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Step 2.3.1
Divide by .
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Step 2.3.1.1
Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of .
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Step 2.3.1.2
Divide the highest order term in the dividend by the highest order term in divisor .
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Step 2.3.1.3
Multiply the new quotient term by the divisor.
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++
Step 2.3.1.4
The expression needs to be subtracted from the dividend, so change all the signs in
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--
Step 2.3.1.5
After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.
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--
-
Step 2.3.1.6
Pull the next terms from the original dividend down into the current dividend.
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--
-+
Step 2.3.1.7
Divide the highest order term in the dividend by the highest order term in divisor .
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+++
--
-+
Step 2.3.1.8
Multiply the new quotient term by the divisor.
-
+++
--
-+
--
Step 2.3.1.9
The expression needs to be subtracted from the dividend, so change all the signs in
-
+++
--
-+
++
Step 2.3.1.10
After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.
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+++
--
-+
++
+
Step 2.3.1.11
The final answer is the quotient plus the remainder over the divisor.
Step 2.3.2
Split the single integral into multiple integrals.
Step 2.3.3
By the Power Rule, the integral of with respect to is .
Step 2.3.4
Apply the constant rule.
Step 2.3.5
Since is constant with respect to , move out of the integral.
Step 2.3.6
Let . Then . Rewrite using and .
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Step 2.3.6.1
Let . Find .
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Step 2.3.6.1.1
Differentiate .
Step 2.3.6.1.2
By the Sum Rule, the derivative of with respect to is .
Step 2.3.6.1.3
Differentiate using the Power Rule which states that is where .
Step 2.3.6.1.4
Since is constant with respect to , the derivative of with respect to is .
Step 2.3.6.1.5
Add and .
Step 2.3.6.2
Rewrite the problem using and .
Step 2.3.7
The integral of with respect to is .
Step 2.3.8
Simplify.
Step 2.3.9
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
Simplify .
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Step 3.1.1
Simplify each term.
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Step 3.1.1.1
Combine and .
Step 3.1.1.2
Simplify by moving inside the logarithm.
Step 3.1.2
To write as a fraction with a common denominator, multiply by .
Step 3.1.3
Simplify terms.
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Step 3.1.3.1
Combine and .
Step 3.1.3.2
Combine the numerators over the common denominator.
Step 3.1.4
Simplify the numerator.
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Step 3.1.4.1
Multiply .
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Step 3.1.4.1.1
Reorder and .
Step 3.1.4.1.2
Simplify by moving inside the logarithm.
Step 3.1.4.2
Multiply the exponents in .
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Step 3.1.4.2.1
Apply the power rule and multiply exponents, .
Step 3.1.4.2.2
Multiply by .
Step 3.1.4.3
Remove the absolute value in because exponentiations with even powers are always positive.
Step 3.2
Find the LCD of the terms in the equation.
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Step 3.2.1
Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.
Step 3.2.2
Since contains both numbers and variables, there are two steps to find the LCM. Find LCM for the numeric part then find LCM for the variable part .
Step 3.2.3
The LCM is the smallest positive number that all of the numbers divide into evenly.
1. List the prime factors of each number.
2. Multiply each factor the greatest number of times it occurs in either number.
Step 3.2.4
Since has no factors besides and .
is a prime number
Step 3.2.5
The number is not a prime number because it only has one positive factor, which is itself.
Not prime
Step 3.2.6
Since has no factors besides and .
is a prime number
Step 3.2.7
The number is not a prime number because it only has one positive factor, which is itself.
Not prime
Step 3.2.8
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either number.
Step 3.2.9
The factors for are , which is multiplied by each other times.
occurs times.
Step 3.2.10
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either term.
Step 3.2.11
Multiply by .
Step 3.2.12
The LCM for is the numeric part multiplied by the variable part.
Step 3.3
Multiply each term in by to eliminate the fractions.
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Step 3.3.1
Multiply each term in by .
Step 3.3.2
Simplify the left side.
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Step 3.3.2.1
Cancel the common factor of .
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Step 3.3.2.1.1
Move the leading negative in into the numerator.
Step 3.3.2.1.2
Cancel the common factor.
Step 3.3.2.1.3
Rewrite the expression.
Step 3.3.3
Simplify the right side.
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Step 3.3.3.1
Simplify each term.
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Step 3.3.3.1.1
Rewrite using the commutative property of multiplication.
Step 3.3.3.1.2
Multiply by .
Step 3.3.3.1.3
Rewrite using the commutative property of multiplication.
Step 3.3.3.1.4
Cancel the common factor of .
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Step 3.3.3.1.4.1
Cancel the common factor.
Step 3.3.3.1.4.2
Rewrite the expression.
Step 3.3.3.1.5
Apply the distributive property.
Step 3.3.3.1.6
Rewrite using the commutative property of multiplication.
Step 3.3.3.2
Reorder factors in .
Step 3.4
Solve the equation.
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Step 3.4.1
Rewrite the equation as .
Step 3.4.2
Factor out of .
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Step 3.4.2.1
Factor out of .
Step 3.4.2.2
Factor out of .
Step 3.4.2.3
Factor out of .
Step 3.4.2.4
Factor out of .
Step 3.4.2.5
Factor out of .
Step 3.4.2.6
Factor out of .
Step 3.4.2.7
Factor out of .
Step 3.4.3
Divide each term in by and simplify.
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Step 3.4.3.1
Divide each term in by .
Step 3.4.3.2
Simplify the left side.
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Step 3.4.3.2.1
Cancel the common factor of .
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Step 3.4.3.2.1.1
Cancel the common factor.
Step 3.4.3.2.1.2
Divide by .
Step 3.4.3.3
Simplify the right side.
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Step 3.4.3.3.1
Move the negative in front of the fraction.
Step 3.4.3.3.2
Factor out of .
Step 3.4.3.3.3
Factor out of .
Step 3.4.3.3.4
Factor out of .
Step 3.4.3.3.5
Factor out of .
Step 3.4.3.3.6
Factor out of .
Step 3.4.3.3.7
Factor out of .
Step 3.4.3.3.8
Factor out of .
Step 3.4.3.3.9
Simplify the expression.
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Step 3.4.3.3.9.1
Rewrite as .
Step 3.4.3.3.9.2
Move the negative in front of the fraction.
Step 3.4.3.3.9.3
Multiply by .
Step 3.4.3.3.9.4
Multiply by .
Step 3.4.4
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
Step 3.4.5
Simplify .
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Step 3.4.5.1
Rewrite as .
Step 3.4.5.2
Any root of is .
Step 3.4.5.3
Multiply by .
Step 3.4.5.4
Combine and simplify the denominator.
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Step 3.4.5.4.1
Multiply by .
Step 3.4.5.4.2
Raise to the power of .
Step 3.4.5.4.3
Raise to the power of .
Step 3.4.5.4.4
Use the power rule to combine exponents.
Step 3.4.5.4.5
Add and .
Step 3.4.5.4.6
Rewrite as .
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Step 3.4.5.4.6.1
Use to rewrite as .
Step 3.4.5.4.6.2
Apply the power rule and multiply exponents, .
Step 3.4.5.4.6.3
Combine and .
Step 3.4.5.4.6.4
Cancel the common factor of .
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Step 3.4.5.4.6.4.1
Cancel the common factor.
Step 3.4.5.4.6.4.2
Rewrite the expression.
Step 3.4.5.4.6.5
Simplify.
Step 3.4.6
The complete solution is the result of both the positive and negative portions of the solution.
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Step 3.4.6.1
First, use the positive value of the to find the first solution.
Step 3.4.6.2
Next, use the negative value of the to find the second solution.
Step 3.4.6.3
The complete solution is the result of both the positive and negative portions of the solution.
Step 4
Simplify the constant of integration.