Calculus Examples

Find the Derivative - d/dt (e^(-t))/(1+t^2)
Step 1
Differentiate using the Quotient Rule which states that is where and .
Step 2
Differentiate using the chain rule, which states that is where and .
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Step 2.1
To apply the Chain Rule, set as .
Step 2.2
Differentiate using the Exponential Rule which states that is where =.
Step 2.3
Replace all occurrences of with .
Step 3
Differentiate.
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Step 3.1
Since is constant with respect to , the derivative of with respect to is .
Step 3.2
Differentiate using the Power Rule which states that is where .
Step 3.3
Simplify the expression.
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Step 3.3.1
Multiply by .
Step 3.3.2
Move to the left of .
Step 3.3.3
Rewrite as .
Step 3.4
By the Sum Rule, the derivative of with respect to is .
Step 3.5
Since is constant with respect to , the derivative of with respect to is .
Step 3.6
Add and .
Step 3.7
Differentiate using the Power Rule which states that is where .
Step 3.8
Multiply by .
Step 4
Simplify.
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Step 4.1
Apply the distributive property.
Step 4.2
Apply the distributive property.
Step 4.3
Simplify the numerator.
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Step 4.3.1
Simplify each term.
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Step 4.3.1.1
Multiply by .
Step 4.3.1.2
Rewrite as .
Step 4.3.2
Reorder factors in .
Step 4.4
Reorder terms.
Step 4.5
Simplify the numerator.
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Step 4.5.1
Factor out of .
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Step 4.5.1.1
Factor out of .
Step 4.5.1.2
Factor out of .
Step 4.5.1.3
Factor out of .
Step 4.5.1.4
Factor out of .
Step 4.5.1.5
Factor out of .
Step 4.5.2
Factor by grouping.
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Step 4.5.2.1
For a polynomial of the form , rewrite the middle term as a sum of two terms whose product is and whose sum is .
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Step 4.5.2.1.1
Factor out of .
Step 4.5.2.1.2
Rewrite as plus
Step 4.5.2.1.3
Apply the distributive property.
Step 4.5.2.2
Factor out the greatest common factor from each group.
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Step 4.5.2.2.1
Group the first two terms and the last two terms.
Step 4.5.2.2.2
Factor out the greatest common factor (GCF) from each group.
Step 4.5.2.3
Factor the polynomial by factoring out the greatest common factor, .
Step 4.5.3
Combine exponents.
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Step 4.5.3.1
Factor out of .
Step 4.5.3.2
Rewrite as .
Step 4.5.3.3
Factor out of .
Step 4.5.3.4
Rewrite as .
Step 4.5.3.5
Raise to the power of .
Step 4.5.3.6
Raise to the power of .
Step 4.5.3.7
Use the power rule to combine exponents.
Step 4.5.3.8
Add and .
Step 4.5.4
Factor out negative.
Step 4.6
Move the negative in front of the fraction.