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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 1.2.4
Multiply by .
Step 1.3
Evaluate .
Step 1.3.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.3.2
Differentiate using the Power Rule which states that is where .
Step 1.3.3
Multiply by .
Step 1.4
Since is constant with respect to , the derivative of with respect to is .
Step 1.5
Evaluate .
Step 1.5.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.5.2
Rewrite as .
Step 1.5.3
Differentiate using the Power Rule which states that is where .
Step 1.5.4
Multiply by .
Step 1.6
Simplify.
Step 1.6.1
Rewrite the expression using the negative exponent rule .
Step 1.6.2
Combine terms.
Step 1.6.2.1
Add and .
Step 1.6.2.2
Combine and .
Step 1.6.2.3
Move the negative in front of the fraction.
Step 1.6.3
Reorder terms.
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
Differentiate using the Power Rule which states that is where .
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 Power Rule which states that is where .
Step 2.2.5
Multiply the exponents in .
Step 2.2.5.1
Apply the power rule and multiply exponents, .
Step 2.2.5.2
Multiply by .
Step 2.2.6
Multiply by .
Step 2.2.7
Raise to the power of .
Step 2.2.8
Use the power rule to combine exponents.
Step 2.2.9
Subtract from .
Step 2.2.10
Multiply by .
Step 2.3
Since is constant with respect to , the derivative of with respect to is .
Step 2.4
Simplify.
Step 2.4.1
Rewrite the expression using the negative exponent rule .
Step 2.4.2
Combine terms.
Step 2.4.2.1
Combine and .
Step 2.4.2.2
Add and .
Step 2.4.3
Reorder terms.
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 4.1.2.4
Multiply by .
Step 4.1.3
Evaluate .
Step 4.1.3.1
Since is constant with respect to , the derivative of with respect to is .
Step 4.1.3.2
Differentiate using the Power Rule which states that is where .
Step 4.1.3.3
Multiply by .
Step 4.1.4
Since is constant with respect to , the derivative of with respect to is .
Step 4.1.5
Evaluate .
Step 4.1.5.1
Since is constant with respect to , the derivative of with respect to is .
Step 4.1.5.2
Rewrite as .
Step 4.1.5.3
Differentiate using the Power Rule which states that is where .
Step 4.1.5.4
Multiply by .
Step 4.1.6
Simplify.
Step 4.1.6.1
Rewrite the expression using the negative exponent rule .
Step 4.1.6.2
Combine terms.
Step 4.1.6.2.1
Add and .
Step 4.1.6.2.2
Combine and .
Step 4.1.6.2.3
Move the negative in front of the fraction.
Step 4.1.6.3
Reorder terms.
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
Graph each side of the equation. The solution is the x-value of the point of intersection.
Step 6
Step 6.1
Set the denominator in equal to to find where the expression is undefined.
Step 6.2
Solve for .
Step 6.2.1
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
Step 6.2.2
Simplify .
Step 6.2.2.1
Rewrite as .
Step 6.2.2.2
Pull terms out from under the radical, assuming positive real numbers.
Step 6.2.2.3
Plus or minus is .
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 each term.
Step 9.1.1
Raise to the power of .
Step 9.1.2
Divide by .
Step 9.2
Add and .
Step 10
is a local minimum because the value of the second derivative is positive. This is referred to as the second derivative test.
is a local minimum
Step 11
Step 11.1
Replace the variable with in the expression.
Step 11.2
Simplify the result.
Step 11.2.1
Simplify each term.
Step 11.2.1.1
Raise to the power of .
Step 11.2.1.2
Multiply by .
Step 11.2.1.3
Multiply by .
Step 11.2.1.4
Divide by .
Step 11.2.2
Simplify by adding and subtracting.
Step 11.2.2.1
Add and .
Step 11.2.2.2
Subtract from .
Step 11.2.2.3
Add and .
Step 11.2.3
The final answer is .
Step 12
These are the local extrema for .
is a local minima
Step 13