Composition of Functions and Invertible Function - Revision history

Ramamurthy: /* Introduction */

2023-12-22T11:08:22Z

Introduction

← Older revision		Revision as of 16:38, 22 December 2023
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	== ~~'''~~Introduction~~'''~~ ==		== Introduction ==
	Composition of functions and inverse functions are fundamental concepts in mathematics that play a crucial role in solving equations, analyzing relationships, and constructing mathematical models. Understanding these concepts is essential for students to grasp the power and flexibility of functions.		Composition of functions and inverse functions are fundamental concepts in mathematics that play a crucial role in solving equations, analyzing relationships, and constructing mathematical models. Understanding these concepts is essential for students to grasp the power and flexibility of functions.

	== ~~'''~~Composition of Functions~~'''~~ ==		== Composition of Functions ==
	The composition of two functions <math>f</math> and <math>g</math> , denoted by <math>f \circ g</math>, is a new function that combines the operations of <math>f</math> and <math>g</math>. It is defined as follows:		The composition of two functions <math>f</math> and <math>g</math> , denoted by <math>f \circ g</math>, is a new function that combines the operations of <math>f</math> and <math>g</math>. It is defined as follows:

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	In other words, to evaluate <math>f \circ g</math> at a value <math>x</math>, we first evaluate <math>g(x)</math> and then use the result as the input for <math>f</math>.		In other words, to evaluate <math>f \circ g</math> at a value <math>x</math>, we first evaluate <math>g(x)</math> and then use the result as the input for <math>f</math>.

	=== ~~'''~~Properties of Composition~~'''~~ ===		=== Properties of Composition ===
	# '''Associativity:''' <math>(f \circ g) \circ h=f \circ (g \circ h)</math>		# '''Associativity:''' <math>(f \circ g) \circ h=f \circ (g \circ h)</math>
	# '''Identity Function:''' <math>f \circ i=f= i \circ f</math> where <math>i</math> represents the identity function <math>(i(x)=x)</math>		# '''Identity Function:''' <math>f \circ i=f= i \circ f</math> where <math>i</math> represents the identity function <math>(i(x)=x)</math>

	=== ~~'''~~Examples of Composition~~'''~~ ===		=== Examples of Composition ===
	# Suppose <math>f(x)=x^2		# Suppose <math>f(x)=x^2

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	</math> . Then, <math>(h \circ k)(x)=h(k(x))=h(x^3)=\sqrt{x^3}</math>		</math> . Then, <math>(h \circ k)(x)=h(k(x))=h(x^3)=\sqrt{x^3}</math>

	=== ~~'''~~Graphs of Composed Functions~~'''~~ ===		=== Graphs of Composed Functions ===
	To visualize the composition of functions, we can combine the graphs of the individual functions:		To visualize the composition of functions, we can combine the graphs of the individual functions:

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	# To find the graph of <math>(f \circ g)(x)</math> , take the output from the graph of <math>g(x)</math> and use it as the input for the graph of <math>f(x)</math>.		# To find the graph of <math>(f \circ g)(x)</math> , take the output from the graph of <math>g(x)</math> and use it as the input for the graph of <math>f(x)</math>.

	== ~~'''~~Inverse Functions~~'''~~ ==		== Inverse Functions ==
	An inverse function of a function <math>f</math> , denoted by <math>f^{-1}</math> , is a function that reverses the operation of <math>f</math>. In other words, for any input <math>x</math> in the domain of <math>f</math> , there exists an output <math>y</math> in the range of <math>f</math> such that <math>f^{-1}(y)=x</math>.		An inverse function of a function <math>f</math> , denoted by <math>f^{-1}</math> , is a function that reverses the operation of <math>f</math>. In other words, for any input <math>x</math> in the domain of <math>f</math> , there exists an output <math>y</math> in the range of <math>f</math> such that <math>f^{-1}(y)=x</math>.

	=== ~~'''~~Properties of Inverse Functions~~'''~~ ===		=== Properties of Inverse Functions ===
	# '''Domain and Range:''' The domain of <math>f^{-1}</math> is the range of <math>f</math>, and the range of <math>f^{-1}</math> is the domain of <math>f</math>.		# '''Domain and Range:''' The domain of <math>f^{-1}</math> is the range of <math>f</math>, and the range of <math>f^{-1}</math> is the domain of <math>f</math>.
	# '''Composition:''' <math>f \circ f^{-1}=i= f^{-1} \circ f</math> , where <math>i</math> represents the identity function <math>(i(x)=x)</math>		# '''Composition:''' <math>f \circ f^{-1}=i= f^{-1} \circ f</math> , where <math>i</math> represents the identity function <math>(i(x)=x)</math>

	=== ~~'''~~Finding Inverse Functions~~'''~~ ===		=== Finding Inverse Functions ===
	# Replace <math>y</math> with <math>x</math> in the original function <math>f(x)</math> and solve for <math>x</math>. The resulting equation represents <math>f^{-1}(x)</math>.		# Replace <math>y</math> with <math>x</math> in the original function <math>f(x)</math> and solve for <math>x</math>. The resulting equation represents <math>f^{-1}(x)</math>.
	# For example, if <math>f(x)=2x+1</math> , then <math>f^{-1}(x)=\frac		# For example, if <math>f(x)=2x+1</math> , then <math>f^{-1}(x)=\frac
	{(x-1)}{2}</math>.		{(x-1)}{2}</math>.

	== ~~'''~~Applications of Composition and Inverse Functions~~'''~~ ==		== Applications of Composition and Inverse Functions ==
	# Solving equations involving composite functions		# Solving equations involving composite functions
	# Modeling real-world relationships		# Modeling real-world relationships
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	# Constructing new functions with desired properties		# Constructing new functions with desired properties

	== ~~'''~~Conclusion~~'''~~ ==		== Conclusion ==
	Composition of functions and inverse functions are powerful tools in mathematics that allow for manipulating and transforming functions to solve problems, analyze relationships, and construct mathematical models. Understanding these concepts is essential for students to develop a deeper understanding of functions and their applications in various fields.		Composition of functions and inverse functions are powerful tools in mathematics that allow for manipulating and transforming functions to solve problems, analyze relationships, and construct mathematical models. Understanding these concepts is essential for students to develop a deeper understanding of functions and their applications in various fields.
	[[Category:Relations and Functions]]		[[Category:Relations and Functions]]
	[[Category:Mathematics]]		[[Category:Mathematics]]
	[[Category:Class-12]]		[[Category:Class-12]]

Ramamurthy: /* Composition of Functions */

2023-12-21T11:29:06Z

Composition of Functions

← Older revision		Revision as of 16:59, 21 December 2023
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	In other words, to evaluate <math>f \circ g</math> at a value <math>x</math>, we first evaluate <math>g(x)</math> and then use the result as the input for <math>f</math>.		In other words, to evaluate <math>f \circ g</math> at a value <math>x</math>, we first evaluate <math>g(x)</math> and then use the result as the input for <math>f</math>.

	=== '''Properties of Composition:''' ===		=== '''Properties of Composition''' ===
	# '''Associativity:''' <math>(f \circ g) \circ h=f \circ (g \circ h)</math>		# '''Associativity:''' <math>(f \circ g) \circ h=f \circ (g \circ h)</math>
	# '''Identity Function:''' <math>f \circ i=f= i \circ f</math> where <math>i</math> represents the identity function <math>(i(x)=x)</math>		# '''Identity Function:''' <math>f \circ i=f= i \circ f</math> where <math>i</math> represents the identity function <math>(i(x)=x)</math>

	=== '''Examples of Composition:''' ===		=== '''Examples of Composition''' ===
	# Suppose <math>f(x)=x^2		# Suppose <math>f(x)=x^2

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	</math> . Then, <math>(h \circ k)(x)=h(k(x))=h(x^3)=\sqrt{x^3}</math>		</math> . Then, <math>(h \circ k)(x)=h(k(x))=h(x^3)=\sqrt{x^3}</math>

	=== '''Graphs of Composed Functions:''' ===		=== '''Graphs of Composed Functions''' ===
	To visualize the composition of functions, we can combine the graphs of the individual functions:		To visualize the composition of functions, we can combine the graphs of the individual functions:

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	An inverse function of a function <math>f</math> , denoted by <math>f^{-1}</math> , is a function that reverses the operation of <math>f</math>. In other words, for any input <math>x</math> in the domain of <math>f</math> , there exists an output <math>y</math> in the range of <math>f</math> such that <math>f^{-1}(y)=x</math>.		An inverse function of a function <math>f</math> , denoted by <math>f^{-1}</math> , is a function that reverses the operation of <math>f</math>. In other words, for any input <math>x</math> in the domain of <math>f</math> , there exists an output <math>y</math> in the range of <math>f</math> such that <math>f^{-1}(y)=x</math>.

	=== '''Properties of Inverse Functions:''' ===		=== '''Properties of Inverse Functions''' ===
	# '''Domain and Range:''' The domain of <math>f^{-1}</math> is the range of <math>f</math>, and the range of <math>f^{-1}</math> is the domain of <math>f</math>.		# '''Domain and Range:''' The domain of <math>f^{-1}</math> is the range of <math>f</math>, and the range of <math>f^{-1}</math> is the domain of <math>f</math>.
	# '''Composition:''' <math>f \circ f^{-1}=i= f^{-1} \circ f</math> , where <math>i</math> represents the identity function <math>(i(x)=x)</math>		# '''Composition:''' <math>f \circ f^{-1}=i= f^{-1} \circ f</math> , where <math>i</math> represents the identity function <math>(i(x)=x)</math>

	=== '''Finding Inverse Functions:''' ===		=== '''Finding Inverse Functions''' ===
	# Replace <math>y</math> with <math>x</math> in the original function <math>f(x)</math> and solve for <math>x</math>. The resulting equation represents <math>f^{-1}(x)</math>.		# Replace <math>y</math> with <math>x</math> in the original function <math>f(x)</math> and solve for <math>x</math>. The resulting equation represents <math>f^{-1}(x)</math>.
	# For example, if <math>f(x)=2x+1</math> , then <math>f^{-1}(x)=\frac		# For example, if <math>f(x)=2x+1</math> , then <math>f^{-1}(x)=\frac
	{(x-1)}{2}</math>.		{(x-1)}{2}</math>.

	== '''Applications of Composition and Inverse Functions:''' ==		== '''Applications of Composition and Inverse Functions''' ==
	# Solving equations involving composite functions		# Solving equations involving composite functions
	# Modeling real-world relationships		# Modeling real-world relationships

Ramamurthy at 11:28, 21 December 2023

2023-12-21T11:28:26Z

← Older revision		Revision as of 16:58, 21 December 2023
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	{(x-1)}{2}</math>.		{(x-1)}{2}</math>.

	=== '''Applications of Composition and Inverse Functions:''' ===		== '''Applications of Composition and Inverse Functions:''' ==
	# Solving equations involving composite functions		# Solving equations involving composite functions
	# Modeling real-world relationships		# Modeling real-world relationships

Ramamurthy at 11:27, 21 December 2023

2023-12-21T11:27:41Z

Show changes

Ramamurthy at 10:41, 21 December 2023

2023-12-21T10:41:35Z

← Older revision		Revision as of 16:11, 21 December 2023
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	'''Composition of Functions'''		'''Composition of Functions'''

	The composition of two functions f and g, denoted by f ∘ g, is a new function that combines the operations of f and g. It is defined as follows:		The composition of two functions <math>f</math> and <math>g</math> , denoted by <math>f \circ g</math>f ∘ g, is a new function that combines the operations of f and g. It is defined as follows:

	(f ∘ g)(x) = f(g(x))		(f ∘ g)(x) = f(g(x))

Vinamra at 06:49, 27 November 2023

2023-11-27T06:49:37Z

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+'''Introduction'''
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2023-11-27T06:45:25Z

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	[[Category:Relations and Functions]]		[[Category:Relations and Functions]]
	[[Category:Mathematics]]		[[Category:Mathematics]]
			[[Category:Class-12]]

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2023-11-27T06:45:12Z

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	[[Category:Relations and Functions]]		[[Category:Relations and Functions]]
			[[Category:Mathematics]]

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2023-11-27T06:45:00Z

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			[[Category:Relations and Functions]]

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2023-11-27T06:44:44Z

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