5 Steps to a 5 AP Calculus BC 2019

(Marvins-Underground-K-12) #1

210 STEP 4. Review the Knowledge You Need to Score High


Evaluating Integrals

INTEGRAL REWRITE ANTIDERIVATIVE

x^3 dx
x^4
4

+C



dx


1 dx x+C

5 dx 5 x+C

∫ √
xdx


x^1 /^2 dx
x^3 /^2
3 / 2
+Cor
2 x^3 /^2
3

+C



x^5 /^2 dx
x^7 /^2
7 / 2
+Cor
2 x^7 /^2
7

+C



1
x^2
dx


x−^2 dx
x−^1
− 1
+Cor

− 1


x

+C



1

√ (^3) x 2 dx

1
x^2 /^3
dx=

x−^2 /^3 dx
x^1 /^3
1 / 3
+Cor 3^3



x+C


x+ 1
x
dx

∫ (
1 +

1


x

)
dx x+ln|x|+C


x(x^5 +1)dx


(x^6 +x)dx
x^7
7

+


x^2
2

+C


Example 1
Evaluate


(x^5 − 6 x^2 +x−1)dx.

Applying the formula


xndx=
xn+^1
n+ 1
+C,n/=−1.

(x^5 − 6 x^2 +x−1)dx=

x^6
6
− 2 x^3 +

x^2
2
−x+C

Example 2
Evaluate

∫ (

x+

1


x^3

)
dx.

Rewrite

∫ (√
x+

1


x^3

)
dxas

∫ (
x^1 /^2 +x−^3

)
dx=
x^3 /^2
3 / 2

+


x−^2
− 2

+C


=


2


3


x^3 /^2 −

1


2 x^2

+C.

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