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Algebra Examples
Step 1
Step 1.1
By the Sum Rule, the derivative of with respect to is .
Step 1.2
Evaluate .
Step 1.2.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.2.2
Differentiate using the Power Rule which states that is where .
Step 1.2.3
Multiply by .
Step 1.3
Evaluate .
Step 1.3.1
Differentiate using the chain rule, which states that is where and .
Step 1.3.1.1
To apply the Chain Rule, set as .
Step 1.3.1.2
Differentiate using the Power Rule which states that is where .
Step 1.3.1.3
Replace all occurrences of with .
Step 1.3.2
By the Sum Rule, the derivative of with respect to is .
Step 1.3.3
Differentiate using the Power Rule which states that is where .
Step 1.3.4
Since is constant with respect to , the derivative of with respect to is .
Step 1.3.5
To write as a fraction with a common denominator, multiply by .
Step 1.3.6
Combine and .
Step 1.3.7
Combine the numerators over the common denominator.
Step 1.3.8
Simplify the numerator.
Step 1.3.8.1
Multiply by .
Step 1.3.8.2
Subtract from .
Step 1.3.9
Move the negative in front of the fraction.
Step 1.3.10
Add and .
Step 1.3.11
Combine and .
Step 1.3.12
Multiply by .
Step 1.3.13
Move to the denominator using the negative exponent rule .
Step 2
Step 2.1
Differentiate.
Step 2.1.1
By the Sum Rule, the derivative of with respect to is .
Step 2.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 2.2
Evaluate .
Step 2.2.1
Since is constant with respect to , the derivative of with respect to is .
Step 2.2.2
Rewrite as .
Step 2.2.3
Differentiate using the chain rule, which states that is where and .
Step 2.2.3.1
To apply the Chain Rule, set as .
Step 2.2.3.2
Differentiate using the Power Rule which states that is where .
Step 2.2.3.3
Replace all occurrences of with .
Step 2.2.4
Differentiate using the chain rule, which states that is where and .
Step 2.2.4.1
To apply the Chain Rule, set as .
Step 2.2.4.2
Differentiate using the Power Rule which states that is where .
Step 2.2.4.3
Replace all occurrences of with .
Step 2.2.5
By the Sum Rule, the derivative of with respect to is .
Step 2.2.6
Differentiate using the Power Rule which states that is where .
Step 2.2.7
Since is constant with respect to , the derivative of with respect to is .
Step 2.2.8
Multiply the exponents in .
Step 2.2.8.1
Apply the power rule and multiply exponents, .
Step 2.2.8.2
Combine and .
Step 2.2.8.3
Move the negative in front of the fraction.
Step 2.2.9
To write as a fraction with a common denominator, multiply by .
Step 2.2.10
Combine and .
Step 2.2.11
Combine the numerators over the common denominator.
Step 2.2.12
Simplify the numerator.
Step 2.2.12.1
Multiply by .
Step 2.2.12.2
Subtract from .
Step 2.2.13
Move the negative in front of the fraction.
Step 2.2.14
Add and .
Step 2.2.15
Combine and .
Step 2.2.16
Multiply by .
Step 2.2.17
Move to the denominator using the negative exponent rule .
Step 2.2.18
Combine and .
Step 2.2.19
Move to the denominator using the negative exponent rule .
Step 2.2.20
Multiply by by adding the exponents.
Step 2.2.20.1
Move .
Step 2.2.20.2
Use the power rule to combine exponents.
Step 2.2.20.3
Combine the numerators over the common denominator.
Step 2.2.20.4
Add and .
Step 2.2.21
Multiply by .
Step 2.2.22
Multiply by .
Step 2.3
Subtract from .
Step 3
To find the local maximum and minimum values of the function, set the derivative equal to and solve.
Step 4
Step 4.1
Find the first derivative.
Step 4.1.1
By the Sum Rule, the derivative of with respect to is .
Step 4.1.2
Evaluate .
Step 4.1.2.1
Since is constant with respect to , the derivative of with respect to is .
Step 4.1.2.2
Differentiate using the Power Rule which states that is where .
Step 4.1.2.3
Multiply by .
Step 4.1.3
Evaluate .
Step 4.1.3.1
Differentiate using the chain rule, which states that is where and .
Step 4.1.3.1.1
To apply the Chain Rule, set as .
Step 4.1.3.1.2
Differentiate using the Power Rule which states that is where .
Step 4.1.3.1.3
Replace all occurrences of with .
Step 4.1.3.2
By the Sum Rule, the derivative of with respect to is .
Step 4.1.3.3
Differentiate using the Power Rule which states that is where .
Step 4.1.3.4
Since is constant with respect to , the derivative of with respect to is .
Step 4.1.3.5
To write as a fraction with a common denominator, multiply by .
Step 4.1.3.6
Combine and .
Step 4.1.3.7
Combine the numerators over the common denominator.
Step 4.1.3.8
Simplify the numerator.
Step 4.1.3.8.1
Multiply by .
Step 4.1.3.8.2
Subtract from .
Step 4.1.3.9
Move the negative in front of the fraction.
Step 4.1.3.10
Add and .
Step 4.1.3.11
Combine and .
Step 4.1.3.12
Multiply by .
Step 4.1.3.13
Move to the denominator using the negative exponent rule .
Step 4.2
The first derivative of with respect to is .
Step 5
Step 5.1
Set the first derivative equal to .
Step 5.2
Subtract from both sides of the equation.
Step 5.3
Find the LCD of the terms in the equation.
Step 5.3.1
Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.
Step 5.3.2
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 5.3.3
Since has no factors besides and .
is a prime number
Step 5.3.4
The LCM of is the result of multiplying all prime factors the greatest number of times they occur in either number.
Step 5.3.5
The factor for is itself.
occurs time.
Step 5.3.6
The LCM of is the result of multiplying all factors the greatest number of times they occur in either term.
Step 5.3.7
The Least Common Multiple of some numbers is the smallest number that the numbers are factors of.
Step 5.4
Multiply each term in by to eliminate the fractions.
Step 5.4.1
Multiply each term in by .
Step 5.4.2
Simplify the left side.
Step 5.4.2.1
Rewrite using the commutative property of multiplication.
Step 5.4.2.2
Cancel the common factor of .
Step 5.4.2.2.1
Cancel the common factor.
Step 5.4.2.2.2
Rewrite the expression.
Step 5.4.2.3
Cancel the common factor of .
Step 5.4.2.3.1
Cancel the common factor.
Step 5.4.2.3.2
Rewrite the expression.
Step 5.4.3
Simplify the right side.
Step 5.4.3.1
Cancel the common factor of .
Step 5.4.3.1.1
Move the leading negative in into the numerator.
Step 5.4.3.1.2
Factor out of .
Step 5.4.3.1.3
Cancel the common factor.
Step 5.4.3.1.4
Rewrite the expression.
Step 5.5
Solve the equation.
Step 5.5.1
Rewrite the equation as .
Step 5.5.2
Divide each term in by and simplify.
Step 5.5.2.1
Divide each term in by .
Step 5.5.2.2
Simplify the left side.
Step 5.5.2.2.1
Cancel the common factor.
Step 5.5.2.2.2
Divide by .
Step 5.5.2.3
Simplify the right side.
Step 5.5.2.3.1
Divide by .
Step 5.5.3
Raise each side of the equation to the power of to eliminate the fractional exponent on the left side.
Step 5.5.4
Simplify the exponent.
Step 5.5.4.1
Simplify the left side.
Step 5.5.4.1.1
Simplify .
Step 5.5.4.1.1.1
Multiply the exponents in .
Step 5.5.4.1.1.1.1
Apply the power rule and multiply exponents, .
Step 5.5.4.1.1.1.2
Cancel the common factor of .
Step 5.5.4.1.1.1.2.1
Cancel the common factor.
Step 5.5.4.1.1.1.2.2
Rewrite the expression.
Step 5.5.4.1.1.2
Simplify.
Step 5.5.4.2
Simplify the right side.
Step 5.5.4.2.1
Raise to the power of .
Step 5.5.5
Move all terms not containing to the right side of the equation.
Step 5.5.5.1
Subtract from both sides of the equation.
Step 5.5.5.2
Subtract from .
Step 6
Step 6.1
Convert expressions with fractional exponents to radicals.
Step 6.1.1
Apply the rule to rewrite the exponentiation as a radical.
Step 6.1.2
Anything raised to is the base itself.
Step 6.2
Set the denominator in equal to to find where the expression is undefined.
Step 6.3
Solve for .
Step 6.3.1
To remove the radical on the left side of the equation, cube both sides of the equation.
Step 6.3.2
Simplify each side of the equation.
Step 6.3.2.1
Use to rewrite as .
Step 6.3.2.2
Simplify the left side.
Step 6.3.2.2.1
Simplify .
Step 6.3.2.2.1.1
Apply the product rule to .
Step 6.3.2.2.1.2
Raise to the power of .
Step 6.3.2.2.1.3
Multiply the exponents in .
Step 6.3.2.2.1.3.1
Apply the power rule and multiply exponents, .
Step 6.3.2.2.1.3.2
Cancel the common factor of .
Step 6.3.2.2.1.3.2.1
Cancel the common factor.
Step 6.3.2.2.1.3.2.2
Rewrite the expression.
Step 6.3.2.2.1.4
Simplify.
Step 6.3.2.2.1.5
Apply the distributive property.
Step 6.3.2.2.1.6
Multiply by .
Step 6.3.2.3
Simplify the right side.
Step 6.3.2.3.1
Raising to any positive power yields .
Step 6.3.3
Solve for .
Step 6.3.3.1
Subtract from both sides of the equation.
Step 6.3.3.2
Divide each term in by and simplify.
Step 6.3.3.2.1
Divide each term in by .
Step 6.3.3.2.2
Simplify the left side.
Step 6.3.3.2.2.1
Cancel the common factor of .
Step 6.3.3.2.2.1.1
Cancel the common factor.
Step 6.3.3.2.2.1.2
Divide by .
Step 6.3.3.2.3
Simplify the right side.
Step 6.3.3.2.3.1
Divide by .
Step 7
Critical points to evaluate.
Step 8
Evaluate the second derivative at . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.
Step 9
Step 9.1
Simplify the denominator.
Step 9.1.1
Add and .
Step 9.1.2
Rewrite as .
Step 9.1.3
Apply the power rule and multiply exponents, .
Step 9.1.4
Cancel the common factor of .
Step 9.1.4.1
Cancel the common factor.
Step 9.1.4.2
Rewrite the expression.
Step 9.1.5
Raise to the power of .
Step 9.2
Multiply by .
Step 10
is a local maximum because the value of the second derivative is negative. This is referred to as the second derivative test.
is a local maximum
Step 11
Step 11.1
Replace the variable with in the expression.
Step 11.2
Simplify the result.
Step 11.2.1
Multiply by .
Step 11.2.2
Simplify each term.
Step 11.2.2.1
Move the negative in front of the fraction.
Step 11.2.2.2
Add and .
Step 11.2.2.3
Rewrite as .
Step 11.2.2.4
Apply the power rule and multiply exponents, .
Step 11.2.2.5
Cancel the common factor of .
Step 11.2.2.5.1
Cancel the common factor.
Step 11.2.2.5.2
Rewrite the expression.
Step 11.2.2.6
Raise to the power of .
Step 11.2.3
Simplify the expression.
Step 11.2.3.1
Write as a fraction with a common denominator.
Step 11.2.3.2
Combine the numerators over the common denominator.
Step 11.2.3.3
Add and .
Step 11.2.3.4
Move the negative in front of the fraction.
Step 11.2.4
The final answer is .
Step 12
Evaluate the second derivative at . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.
Step 13
Step 13.1
Simplify the expression.
Step 13.1.1
Add and .
Step 13.1.2
Rewrite as .
Step 13.1.3
Apply the power rule and multiply exponents, .
Step 13.2
Cancel the common factor of .
Step 13.2.1
Cancel the common factor.
Step 13.2.2
Rewrite the expression.
Step 13.3
Simplify the expression.
Step 13.3.1
Raising to any positive power yields .
Step 13.3.2
Multiply by .
Step 13.3.3
The expression contains a division by . The expression is undefined.
Undefined
Step 13.4
The expression contains a division by . The expression is undefined.
Undefined
Undefined
Step 14
Step 14.1
Split into separate intervals around the values that make the first derivative or undefined.
Step 14.2
Substitute any number, such as , from the interval in the first derivative to check if the result is negative or positive.
Step 14.2.1
Replace the variable with in the expression.
Step 14.2.2
Simplify the result.
Step 14.2.2.1
Add and .
Step 14.2.2.2
The final answer is .
Step 14.3
Substitute any number, such as , from the interval in the first derivative to check if the result is negative or positive.
Step 14.3.1
Replace the variable with in the expression.
Step 14.3.2
Simplify the result.
Step 14.3.2.1
Add and .
Step 14.3.2.2
The final answer is .
Step 14.4
Substitute any number, such as , from the interval in the first derivative to check if the result is negative or positive.
Step 14.4.1
Replace the variable with in the expression.
Step 14.4.2
Simplify the result.
Step 14.4.2.1
Simplify each term.
Step 14.4.2.1.1
Simplify the denominator.
Step 14.4.2.1.1.1
Add and .
Step 14.4.2.1.1.2
One to any power is one.
Step 14.4.2.1.2
Multiply by .
Step 14.4.2.2
Combine fractions.
Step 14.4.2.2.1
Combine the numerators over the common denominator.
Step 14.4.2.2.2
Add and .
Step 14.4.2.3
The final answer is .
Step 14.5
Since the first derivative changed signs from positive to negative around , then is a local maximum.
is a local maximum
Step 14.6
Since the first derivative changed signs from negative to positive around , then is a local minimum.
is a local minimum
Step 14.7
These are the local extrema for .
is a local maximum
is a local minimum
is a local maximum
is a local minimum
Step 15