Function Parent Graph Characteristics Name Function
[Pages:9]Harold's Parent Functions "Cheat Sheet"
6 November 2019
Function Name
Algebra
Parent Function
Constant
() =
Linear or Identity
() =
Quadratic or Square
() = 2
Square Root
() =
Graph
Characteristics
Domain: (-, ) Range: [c, c] Inverse Function: Undefined (asymptote) Restrictions: c is a real number Odd/Even: Even General Form:
+ = 0
Domain: (-, ) Range: (-, ) Inverse Function: Same as parent Restrictions: m 0 Odd/Even: Odd General Forms:
+ + = 0 = +
- 0 = ( - 0)
Domain: (-, ) Range: [0, ) Inverse Function:
-1 () = Restrictions: None Odd/Even: Even General Form:
2 + + + = 0
Domain: [0, ) Range: [0, ) Inverse Function:
-1 () = x2 Restrictions: 0 Odd/Even: Neither General Form:
() = ( - ) +
Copyright ? 2011-2019 by Harold Toomey, WyzAnt Tutor
1
Function Parent Name Function
Cubic
() = 3
Graph
Cube Root
() = 3
Reciprocal or Rational
1 () =
Transcendentals
Exponential
() = 10
() =
Logarithmic
() = log
() = ln
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Characteristics
Domain: (-, )
Range: (-, )
Inverse Function:
-1 () = 3
Restrictions: None
Odd/Even: Odd
General Form: () = (( - ))3 +
Domain: (-, )
Range: (-, )
Inverse Function:
-1 () = 3
Restrictions: None
Odd/Even: Odd
General Form:
() = 3( - ) +
Domain: (-, 0) (0, )
Range: (-, 0) (0, )
Inverse Function: Same as parent
Restrictions: x 0
Odd/Even: Odd
General Form:
() =
( - ) +
Domain: (-, ) Range: (0, ) Inverse Function:
-1 () = log
-1 () = ln Restrictions: None, x can be complex Odd/Even: Neither General Form:
() = 10((-)) +
Domain: (0, ) Range: (-, ) Inverse Function:
-1 () = 10
-1 () = Restrictions: x > 0 Odd/Even: Neither General Form:
() = log(( - )) +
2
Function Parent Name Function
Absolute Value
() = ||
Greatest Integer or Floor
() = []
Graph
Characteristics
Domain: (-, )
Range: [0, )
Inverse Function:
-1 () = 0
Restrictions:
()
=
{-,,
0 < 0
Odd/Even: Even
General Form:
() = |( - )| +
Domain: (-, ) Range: (-, ) whole numbers only Inverse Function: Undefined (asymptotic) Restrictions: Real numbers only Odd/Even: Neither General Form:
() = [( - )] +
Inverse Functions
(-1 ()) = -1 (()) =
Domain of x Domain of y Range of y Range of x Inverse Function: By definition Restrictions: None Odd/Even: Odd General Form:
() = (( - )) + Algebraically: Swap , then solve for Graphically: Rotate about 45 line =
Conic Sections
Parabola
= 2
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Domain: (-, ) Range: [, ) or (-, ] Inverse Function:
-1 () = Restrictions: None Odd/Even: Even Vertex : (, ) Focus : (, + ) General Forms:
( - )2 = 4( - )
2 + + 2 + + + = 0 where 2 - 4 = 0
3
Function Parent Name Function
Circle
2 + 2 = 2
Ellipse
2 2 2 + 2 = 1
Hyperbola
2 2 2 - 2 = 1
Graph
Characteristics
Domain: [- + , + ] Range: [- + , + ] Inverse Function: Same as parent Restrictions: None Odd/Even: Both Focus : (, ) General Forms:
( - )2 + ( - )2 = 2
2 + + 2 + + + = 0 = = 0
Domain: [- + , + ] Range: [- + , + ] Inverse Function:
2 2 2 + 2 = 1 Restrictions: None Odd/Even: Both Foci : 2 = 2 - 2 General Forms: ( - )2 ( - )2 2 + 2 = 1
2 + + 2 + + + = 0 where 2 - 4 < 0
Domain: (-, -a+h] [a+h, ) Range: (-, ) Inverse Function:
2 2 2 - 2 = 1 Restrictions: Domain is restricted Odd/Even: Both Foci : 2 = 2 + 2 General Forms: ( - )2 ( - )2 2 - 2 = 1
2 + + 2 + + + = 0 where 2 - 4 > 0
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
4
Function Name
Trigonometry
Parent Function
Sine
() =
Graph
Cosine
() =
Tangent
() =
=
Cosecant
() = 1
=
Secant
() = sec 1
=
Cotangent
() = 1
=
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Characteristics
Domain: (-, ) Range: [-1, 1] Inverse Function: -1 () = -1 Restrictions: None Odd/Even: Odd General Form:
() = (( - )) +
Domain: (-, ) Range: [-1, 1] Inverse Function: -1 () = -1 Restrictions: None Odd/Even: Even General Form:
() = (( - )) +
Domain:
(-,
)
except
for
=
2
?
Range: (-, )
Inverse Function: -1 () = -1
Restrictions:
Asymptotes
at
=
2
?
Odd/Even: Odd
General Form:
() = (( - )) +
Domain: (-, ) except for = ? Range: (-, -1] [1, ) Inverse Function: -1 () = -1 Restrictions: Range is bounded Odd/Even: Odd General Form:
() = (( - )) +
Domain:
(-,
)
except
for
=
2
?
Range: (-,-1] [1, )
Inverse Function: -1 () = -1
Restrictions: Range is bounded
Odd/Even: Even
General Form:
() = (( - )) +
Domain: (-, ) except for = ? Range: (-, ) Inverse Function: -1 () = -1 Restrictions: Asymptotes at x = ? Odd/Even: Odd General Form:
() = (( - )) +
5
Function Parent Name Function
Arcsine
() = -1
Graph
Arccosine
() = -1
Arctangent
() = -1
Arccosecant
() = -1
Arcsecant
() = -1
Arccotangent () = -1 Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Characteristics
Domain: [-1, 1]
Range:
[-
2
,
]
2
or
Quadrants
I
&
IV
Inverse Function: -1 () =
Restrictions: Range & Domain are bounded
Odd/Even: Odd
General Form:
() = -1 (( - )) +
Domain: [-1, 1] Range: [0, ] or Quadrants I & II Inverse Function: -1 () =
Restrictions: Range & Domain are bounded
Odd/Even: None
General Form: () = -1 (( - )) +
Domain: (-, )
Range: (-2 , 2) or Quadrants I & IV Inverse Function: -1 () =
Restrictions: Range is bounded
Odd/Even: Odd
General Form:
() = -1 (( - )) +
Domain: (-,-1] [1, )
Range:
[
-
2
,
0)
(0,
2]
or
Quadrants
I
&
IV
Inverse Function: -1 () =
Restrictions: Range & Domain are bounded
Odd/Even: Odd
General Form:
() = -1 (( - )) +
Domain: (-,-1] [1, )
Range:
[0,
)
2
(2
,
]
or
Quadrants
I
&
II
Inverse Function: -1 () =
Restrictions: Range & Domain are bounded
Odd/Even: Neither
General Form:
() = -1 (( - )) +
Domain: (-, ) Range: (0, ) or Quadrants I & II Inverse Function: -1 () =
Restrictions: Range is bounded Odd/Even: Neither
General Form: () = -1 (( - )) +
6
Function Name
Hyperbolics
Parent Function
Hyperbolic Sine
() = sinh - -
= 2
Graph
Hyperbolic Cosine
() = + -
= 2
Hyperbolic Tangent
() = 2 - 1
= 2 + 1
Hyperbolic Cosecant
() = 1
=
Hyperbolic Secant
() = sech 1
=
Hyperbolic Cotangent
() = 1
=
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Characteristics
Domain: (-, ) Range: (-, ) Inverse Function: -1 () = -1 Restrictions: None Odd/Even: Odd General Form:
() = (( - )) +
Domain: (-, ) Range: [1, ) Inverse Function: -1 () = -1 Restrictions: None Odd/Even: Even General Form:
() = (( - )) +
Domain: (-, ) Range: (-1, 1) Inverse Function: -1 () = -1 Restrictions: Asymptotes at = ?1 Odd/Even: Odd General Form:
() = (( - )) +
Domain: (-, 0) (0, ) Range: (-, 0] [0, ) Inverse Function: -1 () = -1 Restrictions: Asymptotes at = 0, = 0 Odd/Even: Odd General Form:
() = (( - )) +
Domain: (-, ) Range: (0, 1] Inverse Function: -1 () = -1 Restrictions: Asymptote at = 0 Odd/Even: Even General Form:
() = (( - )) + Domain: (-, 0) (0, ) Range: (-, 1) (1, ) Inverse Function: -1 () = -1 Restrictions: Asymptotes at = 0, = ?1 Odd/Even: Odd General Form:
() = (( - )) +
7
Function Parent Name Function
Hyperbolic Arcsine
() = -1 = ( + 2 + 1)
Graph
Hyperbolic Arccosine
() = -1 = ( + 2 - 1)
Hyperbolic Arctangent
() = -1 1 1 +
= 2 (1 - )
Hyperbolic Arccosecant
() = -1
=
1 (
+
12
+
1)
Hyperbolic Arcsecant
() = -1
=
1 (
+
1 2
-
1)
Hyperbolic Arccotangent
() = -1 1 + 1
= 2 ( - 1)
Copyright ? 2011-2019 by Harold A. Toomey, WyzAnt Tutor
Characteristics
Domain: (-, ) Range: (-, ) Inverse Function: -1 () = Restrictions: None Odd/Even: Odd General Form:
() = -1 (( - )) +
Domain: [1, ) Range: [0, ) Inverse Function: -1 () = Restrictions: 0 Odd/Even: Neither General Form:
() = -1 (( - )) +
Domain: (-1, 1) Range: (-, ) Inverse Function: -1 () = Restrictions: Asymptotes at = ?1 Odd/Even: Odd General Form:
() = -1 (( - )) +
Domain: (-, 0) (0, ) Range: (-, 0] [0, ) Inverse Function: -1 () = Restrictions: Asymptotes at = 0, = 0 Odd/Even: Odd General Form:
() = -1 (( - )) +
Domain: (0, 1] Range: [0, ) Inverse Function: -1 () = Restrictions: Odd/Even: Neither General Form:
() = -1 (( - )) +
Domain: [-, -1) (1, ] Range: (-, 0) (0, ) Inverse Function: -1 () = Restrictions: Asymptotes at = 0, = ?1 Odd/Even: Odd General Form:
() = -1 (( - )) +
8
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