Calculus 2 : Definition of Integral

Study concepts, example questions & explanations for Calculus 2

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Example Questions

Example Question #21 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Use Integration By Parts (IBP) to simplify the integral, using the IBP formula

一个ssign the variablesandto appropriate expressions from the original integral,

这些新的表达式代入国际预算促进会形式ula and our integral becomes as follows,

Use IBP again on the integraland assign the variablesandto appropriate expressions from the integral,

这些新的表达式代入国际预算促进会形式ula again and our full expression becomes as follows,

Integrate using the trig integration rules as follows,

所以the final indefinite integral expression becomes

一个nd the final answer is as follows,

Example Question #22 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Make an appropriate u-substitution to simplify the integral.

Since,

Substitute the new expressions containingandback into the original integral as follows,

Use partial fraction decomposition on the integral to simplify the expression as follows,

Setthen,

Setthen,

Setthen,

所以,

一个nd our integral expression becomes

Integrate each term. We will need to use the power rule and natural log integration as follows,

Where,

This results in our final indefinite integral,

替代回到原来的变量替换and simplify to give us our final answer

Example Question #23 :Definition Of Integral

Find the definite integral.

Possible Answers:

Correct answer:

Explanation:

Simplify the integral using an appropriate u-substitution,

Since,

Substitute the new expressions containingandinto the original integral as follows,

Use Integration By Parts (IBP) to simplify the integral further, using the IBP formula

一个ssign the variablesandto appropriate expressions from the integral

Substitute these expressions back into the IBP formula and our integral becomes as follows,

Integrate using the trig integration rule

Our indefinite integral becomes

替代回到原来的变量替换to get our final indefinite integral,

一个pply the given boundariestoto get our final answer.

Example Question #24 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Make an appropriate u-substitution to transform the integral into something we are familiar with.

Substitute the new expressions containingandinto the original equation as follows,

Integrate each term using the power rule.

一个fter integration we get the expression as follows,

替代回到原来的变量替换to get the final answer.

Example Question #25 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

First use Integration By Parts (IBP) to make the integral doable, using the IBP formula,

一个ssign appropriate expressions from the original integral to the variablesandto use in the IBP formula.

Substitute these expressions into the IBP formula and our integral becomes as follows,

Use long division to simplify the expression,

所以,

Substitute this back into its appropriate place in our expression and it becomes as follows,

Integrate each term using the power rule and natural log integration as follows,

Our indefinite integral becomes as follows,

Simplifying, our answer is

Example Question #26 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

First divide the numerator by the denominator, using long division.

Now we can write our integral as follows.

From here we will use partial fraction decomposition.

Setthen,

.

Setthen,

Therefore we get,

.

Now we can rewrite our integral as follows,

.

From here integrate each term. To integrate we will need to use the power rule, integration of a constant, and nautral log integration we are as follows.

Resulting in our final answer,

.

Example Question #27 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

用长除法简化被积函数。

The integral becomes

Use partial fraction decomposition to simplify the expression,

Setthen,

Setthen,

Setthen,

Therefore we get

Now we can rewrite our integral as follows,

Integrate each term using the power rule, integration of a constant, and natural log integration as follows,

Resulting in our final answer,

Example Question #21 :Integrals

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Use Integration By Parts (IBP) to make the integral doable, using the IBP formula.

一个ssign appropriate expressions from the original integral to the variablesandto use in the IBP formula.

Substitute these expressions into the IBP formula and our integral becomes as follows,

Use partial fraction decomposition to further simplify

Setthen,

Setthen,

所以,

Therefore we get

Finish the integration using the natural log integration rule

Resulting in the final answer,

Example Question #29 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Simplify the integral choosing an appropriate u-substitution

Substitute the new expressions containingback into the original integral as follows,

Since,

Integrate using the power rule of integration,

Resulting in the answer after integrating,

Substitute back in our originalfor our final answer,

Example Question #30 :Definition Of Integral

Find the indefinite integral.

Possible Answers:

Correct answer:

Explanation:

Make an appropriate u-substitution to turn the integral into something we are familiar with,

.

一个nd since,

Substitute the new expressions containingback into the original integral as follows,

.

From here we will use Integration By Parts (IBP) to simplify the integral further, using the IBP formula

.

一个ssign the variablesandto appropriate expressions from the original integral,

.

Substitute these new expressions back into the IBP formula and our integral becomes as follows,

.

Integrate using the following integration rule:

.

This results in the expression

.

替代回到原来的变量替换,

.

Simplify to get the final answer,

.

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