AP Calculus Formula List - Math Tutoring with Misha
[Pages:6]AP CALCULUS FORMULA LIST
Definition of e:
e
=
lim
n
1
+
1 n
n
____________________________________________________________________________________
Absolute Value:
x x =
if
x0
-x if x < 0
____________________________________________________________________________________
Definition of the Derivative:
f '( x) = lim f ( x + x) - f ( x)
x
x
f '( x) = lim f ( x + h) - f ( x)
h
h
f '(a) = lim f (a + h) - f (a)
h
h
derivative at x = a
f '( x) = lim f ( x) - f (a)
xa
x-a
alternate form
____________________________________________________________________________________
Definition of Continuity:
f is continuous at c iff:
(1) f (c) is defined
(2) lim f ( x) exists xc
(3) lim f ( x) = f (c) xc
____________________________________________________________________________________
Average Rate of Change of f ( x) on [a, b] = f (b) - f (b)
b- a ____________________________________________________________________________________
Rolle's Theorem:
If f is continuous on [a, b] and differentiable on (a, b) and if f (a) = f (b), then there exists a number c on (a, b) such that f '(c) = 0.
____________________________________________________________________________________
Mean Value Theorem:
If f is continuous on [a, b] and differentiable on (a, b), then there
exists a number c
on
(a, b)
such that
f
'(c) =
f
(b) -
f
(a)
.
b-a
Note : Rolle's Theorem is a special case of The Mean Value Theorem
If f (a) = f (b) then f '(c) = f (a)- f (b) = f (a)- f (a) = 0.
b-a
b-a
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 1 of 6
Intermediate Value Theorem:
If f is continuous on [a, b] and k is any number between f (a) and f (b), then there is at least one number c between a and b such that f (c) = k.
____________________________________________________________________________________
Definition of a Critical Number:
Let f be defined at c. If f '(c) = 0 or f ' is is undefined at c, then c is a critical number of f .
____________________________________________________________________________________
First Derivative Test:
Let c be a critical number of the function f that is continuous on an open interval I containing c.
If f is differentiable on I , except possibly at c, then f (c) can be classified as follows. (1) If f '( x) changes from negative to positive at c, then f (c) is a relative minimum of f . (2) If f '( x) changes from positive to negative at c, then f (c) is a relative maximum of f .
____________________________________________________________________________________
Second Derivative Test:
Let f be a function such that f '(c) = 0 and the second derivative exists
on an open interval containing c.
(1) If f "(c) > 0, then f (c) is a relative minimum. (2) If f "(c) < 0, then f (c) is a relative maximum.
____________________________________________________________________________________
Definition of Concavity:
Let f be differentiable on an open interval I. The graph of f is concave upward on I if f '
is increasing on the interval, and concave downward on I , if f ' is decreasing on the interval. ____________________________________________________________________________________
Test for Concavity: Let f be a function whose second derivative exists on an open interval I.
(1) If f "( x) > 0 for all x in I, then the graph of f is concave upward on I. (2) If f "( x) < 0 for all x in I, then the graph of f is concave downward on I.
____________________________________________________________________________________
Definition of an Inflection Point:
A function f has an inflection point at (c, f (c)) if
(1) f "(c) = 0 or f "(c) does not exist, and if (2) f changes concavity at x = c.
____________________________________________________________________________________
Exponential Growth:
dy = ky dt
y(t) = Cekt
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 2 of 6
( ) ( ) Derivative of an Inverse Function:
f -1
'(x) =
f'
1
f -1 ( x)
____________________________________________________________________________________
First Fundamental Theorem of Calculus:
b f '( x) dx = f (b) - f (a) a
____________________________________________________________________________________
Second Fundamental Theorem of Calculus:
d x f (t ) dt = f ( x)
dx a
d g(x) f (t ) dt = f ( g ( x)) g '( x) Chain Rule Version
dx a ____________________________________________________________________________________
The Average Value of a Function:
Average value of f ( x) on [a, b]
f AVE
=
1 b-a
b f ( x) dx
a
____________________________________________________________________________________
Volume of Revolution:
Volume around a horizontal axis by discs:
V =
b a
r
(
x
)
2
dx
Volume around a horizontal axis by washers:
{ } V = b R ( x)2 - r ( x)2 dx a
____________________________________________________________________________________
Volume of Known Cross-Section:
Cross-sections perpendicular to x-axis:
V = b A( x) dx a
____________________________________________________________________________________
Position, Velocity, Acceleration:
If an object is moving along a straight line with position function s (t ), then
Velocity is:
v(t) = s'(t)
Speed is:
v(t)
Acceleration is:
a(t) = v'(t) = s"(t)
Displacement from x = a to x = b is:
Note : Displacement is a change in position.
Total Distance traveled from x = a to x = b is:
Displacement = bv (t ) dt a
Total Distance = b v (t ) dt a
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 3 of 6
TRIGONOMETRIC IDENTITIES
Pythagorean Identities:
sin2 x + cos2 x = 1
tan2 x +1 = sec2 x
1+ cot2 x = csc2 x
____________________________________________________________________________________
Sum & Difference Identities
sin ( A ? B) = sin Acos B ? cos Asin B
cos ( A ? B) = cos Acos B sin Asin B
tan ( A ? B) = tan A ? tan B
1 tan A tan B ____________________________________________________________________________________
Double Angle Identities
sin 2x = 2sin x cos x cos2 x - sin2 x
cos 2x = 1- 2 sin2 x 2 cos2 x -1
cos2 x = 1+ cos 2x 2
sin2 x = 1- cos 2x 2
tan
2
x
=
1
2 -
tan tan
x
2
x
____________________________________________________________________________________
Half Angle Identities
sin x = ? 1- cos x
2
2
cos x = ? 1+ cos x
2
2
tan x = ? 1- cos x = sin x = 1- cos x 2 1+ cos x 1+ cos x sin x
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 4 of 6
CALCULUS BC ONLY
Integration by Parts: u dv = uv - v du
____________________________________________________________________________________
Arc Length of a Function:
For a function f ( x) with a continuous derivative on [a, b] :
Arc Length is :
s =
b a
1+ f '( x)2 dx
____________________________________________________________________________________
Area of a Surface of Revolution:
For a function f ( x) with a continuous derivative on [a, b]:
Surface Area is :
S = 2 b r ( x) a
1+ f '( x)2 dx
____________________________________________________________________________________
Parametric Equations and the Motion of an Object:
Position Vector = ( x (t ), y (t )) Velocity Vector = ( x '(t ), y '(t )) Acceleration Vector = ( x"(t ), y"(t ))
Speed (or, magnitude of the velocity vector):
v(t) =
dx dt
2
+
dy dt
2
Distance traveled from t = a to t = b is:
s =
b a
dx dt
2
+
dy dt
2
dt
Note : The distance traveled by an object along a parametric curve is the same as
the arc length of a parametric curve.
Slope (1'st derivative) of curve C at ( x (t ), y (t )) is:
dy = dy dt dx dx dt
Second derivative of curve C at ( x (t ), y (t )) is:
d dy
d2y dx2
=
d dx
dy dx
=
dt dx dx dt
____________________________________________________________________________________
L'H?pital's Rule:
f (x)
f '(x)
lim
xc
g
(x)
=
lim
xc
g
'(x)
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 5 of 6
Polar Coordinates and Graphs:
For r = f ( ) :
x = r cos , y = r sin , r2 = x2 + y2 , tan = y x
Slope of a polar curve:
dy dx
=
dy dx
d d
=
f ( ) cos + - f ( )sin +
f '( )sin f '( )cos
=
r cos + r 'sin -r sin + r 'cos
Area inside a polar curve:
A = 1
2
f
(
2
) d
=
1 2
r 2d
Arc length (*):
s=
f ( )2 + f '( )2 d =
r2
+
dr d
2
d
Surface of Revolution (*) :
about the polar axis:
S = 2 f ( )sin
f ( )2 + f '( )2 d
about = : 2
S = 2 f ( ) cos
f ( )2 + f '( )2 d
____________________________________________________________________________________
Euler's Method:
Approximating the particular solution to: y ' = dy = F ( x, y)
dx
xn = xn-1 + h
( ) yn = yn-1 + h F xn-1, yn-1
given: h = x, ( x0, y0 )
____________________________________________________________________________________
Logistic Growth:
dP dt
=
kP 1-
P L
P
(
t
)
=
1
+
L Ce-
kt
k is the proportionality constant where : L is the Carrying Capacity C is the integration constant
____________________________________________________________________________________
The n'th Taylor Polynomial for f at c :
Pn ( x) =
f
(c)+
f
'(c)( x - c) +
f
"(c) ( x - c)2
2!
+
+ f (n) (c) ( x - c)n
n!
The n'th MacLaurin Polynomial for f is the Taylor Polynomial for f when c = 0.
Pn ( x) =
f
(0) +
f
'(0) x +
f
"(0) x2
2!
+
f
"(0) x3
3!
+
+ f (n) (0) xn
n!
____________________________________________________________________________________
ex = 1+ x + x2 + x3 + = xn
2! 3!
n=0 n!
cos x = 1- x2 + x4 - x6 +
2! 4! 6!
=
n=0
( -1)n
x2n
(2n)!
sin x = x - x3 + x5 - x7 +
3! 5! 7!
=
n=0
( -1)n
x 2 n +1
(2n +1)!
Source: adapted from notes by Nancy Stephenson, presented by Joe Milliet at TCU AP Calculus Institute, July 2005
AP Calculus Formula List
Math by Mr. Mueller
Page 6 of 6
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