Calculus Examples

Find the Critical Points f(x)=7x^3-6x^2+1
Step 1
Find the first derivative.
Tap for more steps...
Step 1.1
Find the first derivative.
Tap for more steps...
Step 1.1.1
By the Sum Rule, the derivative of with respect to is .
Step 1.1.2
Evaluate .
Tap for more steps...
Step 1.1.2.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.1.2.2
Differentiate using the Power Rule which states that is where .
Step 1.1.2.3
Multiply by .
Step 1.1.3
Evaluate .
Tap for more steps...
Step 1.1.3.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.1.3.2
Differentiate using the Power Rule which states that is where .
Step 1.1.3.3
Multiply by .
Step 1.1.4
Differentiate using the Constant Rule.
Tap for more steps...
Step 1.1.4.1
Since is constant with respect to , the derivative of with respect to is .
Step 1.1.4.2
Add and .
Step 1.2
The first derivative of with respect to is .
Step 2
Set the first derivative equal to then solve the equation .
Tap for more steps...
Step 2.1
Set the first derivative equal to .
Step 2.2
Factor out of .
Tap for more steps...
Step 2.2.1
Factor out of .
Step 2.2.2
Factor out of .
Step 2.2.3
Factor out of .
Step 2.3
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Step 2.4
Set equal to .
Step 2.5
Set equal to and solve for .
Tap for more steps...
Step 2.5.1
Set equal to .
Step 2.5.2
Solve for .
Tap for more steps...
Step 2.5.2.1
Add to both sides of the equation.
Step 2.5.2.2
Divide each term in by and simplify.
Tap for more steps...
Step 2.5.2.2.1
Divide each term in by .
Step 2.5.2.2.2
Simplify the left side.
Tap for more steps...
Step 2.5.2.2.2.1
Cancel the common factor of .
Tap for more steps...
Step 2.5.2.2.2.1.1
Cancel the common factor.
Step 2.5.2.2.2.1.2
Divide by .
Step 2.6
The final solution is all the values that make true.
Step 3
Find the values where the derivative is undefined.
Tap for more steps...
Step 3.1
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
Step 4
Evaluate at each value where the derivative is or undefined.
Tap for more steps...
Step 4.1
Evaluate at .
Tap for more steps...
Step 4.1.1
Substitute for .
Step 4.1.2
Simplify.
Tap for more steps...
Step 4.1.2.1
Simplify each term.
Tap for more steps...
Step 4.1.2.1.1
Raising to any positive power yields .
Step 4.1.2.1.2
Multiply by .
Step 4.1.2.1.3
Raising to any positive power yields .
Step 4.1.2.1.4
Multiply by .
Step 4.1.2.2
Simplify by adding numbers.
Tap for more steps...
Step 4.1.2.2.1
Add and .
Step 4.1.2.2.2
Add and .
Step 4.2
Evaluate at .
Tap for more steps...
Step 4.2.1
Substitute for .
Step 4.2.2
Simplify.
Tap for more steps...
Step 4.2.2.1
Simplify each term.
Tap for more steps...
Step 4.2.2.1.1
Apply the product rule to .
Step 4.2.2.1.2
Raise to the power of .
Step 4.2.2.1.3
Raise to the power of .
Step 4.2.2.1.4
Cancel the common factor of .
Tap for more steps...
Step 4.2.2.1.4.1
Factor out of .
Step 4.2.2.1.4.2
Cancel the common factor.
Step 4.2.2.1.4.3
Rewrite the expression.
Step 4.2.2.1.5
Apply the product rule to .
Step 4.2.2.1.6
Raise to the power of .
Step 4.2.2.1.7
Raise to the power of .
Step 4.2.2.1.8
Multiply .
Tap for more steps...
Step 4.2.2.1.8.1
Combine and .
Step 4.2.2.1.8.2
Multiply by .
Step 4.2.2.1.9
Move the negative in front of the fraction.
Step 4.2.2.2
Combine fractions.
Tap for more steps...
Step 4.2.2.2.1
Combine the numerators over the common denominator.
Step 4.2.2.2.2
Simplify the expression.
Tap for more steps...
Step 4.2.2.2.2.1
Subtract from .
Step 4.2.2.2.2.2
Move the negative in front of the fraction.
Step 4.2.2.2.2.3
Write as a fraction with a common denominator.
Step 4.2.2.2.2.4
Combine the numerators over the common denominator.
Step 4.2.2.2.2.5
Subtract from .
Step 4.3
List all of the points.
Step 5