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Example Questions
Example Question #778 : Integrals
Evaluate the integral:
There are no substitutions that would work in this instance. Therefore, you must integrate by parts. The formula for integrating by parts is:
TO begin, you must assign values of u and dv based from the two different functions in the original integral. Specifically, .
From here, you can find values for du and v:
was found by using the following formula:
V was found by using a u-substitution where and the fact that:
Following the formula, the integral can be rewritten as:
Once again, there is another integral that cannot be evaluated by using a substitution. Therefore, integration by parts must be used again.
The integral can be rewritten again as:
The integral that is left is easily solvable by using a u-substitution where and the fact that . This leaves you with:
Now, the final answer can be written as:
Example Question #779 : Integrals
Evaluate the integral:
Despite the intimidating look of the problem, simplifications can be made. Since, the integrand can be rewritten as:
Because of the properties of logarithms where , the integrand can be rewritten as:
There are no substitutions that can be done here. Therefore, you must integrate by parts. The formula for integrating by parts is:
To begin, you must assign values of u and dv based from the two different functions in the original integral. Specifically, .
From here, you can find values for du and v:
was found by using the following formula:
V was found by using the following formula:
Following the formula, the integral can be rewritten as:
The integral can be taken by using the following formula:
The final answer is:
Example Question #431 : Finding Integrals
Evaluate the integral:
No substitution would work here, but rewriting the integrand via long division is easiest way to solve this problem.
After long division, the quotient should be with a remainder of 3. Whenever there is a remainder, it must be placed over the divisor as a numerator. This makes the original integral expressed as:
Each term of the integrand can be integrated by using the following formula:
For the last term, however, a u-substitution is needed where . The integrand can be rewritten as:
The final answer is:
Example Question #432 : Finding Integrals
First, chop up the fraction into three separate terms:
Now, integrate. Remember to raise the exponent by 1 and also put that result on the denominator:
Remember to add a C because it is an indefinite integral:
Example Question #433 : Finding Integrals
Remember that when integrating, raise the exponent by 1 and also put that result on the denominator:
Simplify to get:
Add C because it is an indefinite integral:
Example Question #151 : Indefinite Integrals
Find .
Using integration by parts, let , , , and .
Use the formula to get .
Then, you can use substitution for the integral in the new equation. If , then .
Using substitution, the second half of the expression becomes, .
If you use the Power Rule,
If you substitute this back in, you get , and you can simplify this to .
Example Question #151 : Indefinite Integrals
Solve .
Splitting up the integral with the Sum Rule turns the problem into:.
We can then use the Power Rule to solve the equation:
, which can be simplified to .
Example Question #151 : Indefinite Integrals
Find:
First, FOIL the products so we have: .
Then, we can just use the Power Rule:
.
Example Question #152 : Indefinite Integrals
Solve: .
Can't be solved
To solve the equation, one should know that the integral of is , and the integral of . Using these rules and pulling out the constant, we get .
Example Question #2537 : Calculus Ii
Solve the indefinite integral.
To solve the indefinite integral
we use u-substitution, setting . We derive that equation to get and so the integral becomes
The integral then becomes
and substituting back in for yields
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