Knowee
Questions
Features
Study Tools

Composition of two functions is always commutative.Group startsTrue or FalseTrue, unselectedFalse, unselected

Question

Composition of two functions is always commutative.

Group starts
True or False

  • True, unselected
  • False, unselected
🧐 Not the exact question you are looking for?Go ask a question

Solution

Break Down the Problem

  1. Understand what function composition is.
  2. Assess whether composition of functions satisfies the commutative property.

Relevant Concepts

  1. Function Composition: If f f and g g are two functions, their composition is given by (fg)(x)=f(g(x)) (f \circ g)(x) = f(g(x)) .
  2. Commutative Property: A binary operation \ast is commutative if ab=ba a \ast b = b \ast a for any a a and b b .

Analysis and Detail

  1. To determine if composition is commutative, we need to check whether f(g(x))=g(f(x)) f(g(x)) = g(f(x)) holds true for all functions f f and g g .

  2. Taking two specific functions as examples:

    • Let f(x)=x+1 f(x) = x + 1
    • Let g(x)=2x g(x) = 2x

    Evaluating fg f \circ g : (fg)(x)=f(g(x))=f(2x)=2x+1 (f \circ g)(x) = f(g(x)) = f(2x) = 2x + 1

    Now evaluating gf g \circ f : (gf)(x)=g(f(x))=g(x+1)=2(x+1)=2x+2 (g \circ f)(x) = g(f(x)) = g(x + 1) = 2(x + 1) = 2x + 2

    Since 2x+12x+2 2x + 1 \neq 2x + 2 , it shows that if f f and g g are chosen this way, the compositions are not equal.

Verify and Summarize

  1. Since we have found a counterexample to the claim of commutativity, we can conclude that function composition is not always commutative.

Final Answer

False: The composition of two functions is not always commutative.

This problem has been solved

Similar Questions

Every injective function is invertible.Group startsTrue or FalseTrue, unselectedFalse, unselected

Cartesian product of any two sets is commutative.Group startsTrue or FalseTrue, unselectedFalse, unselected

If f = {(1, 2), (3, 5), (4, 1)} and g = {(2, 3), (5, 1), (1, 3)} then gof = {(1, 3), (3, 1), (4, 3)}Group startsTrue or FalseTrue, unselectedFalse

The set  F = {(a,x), (b,z), (c,x)}is a function from a set A = {a,b,c} to a set B = {x,y,z}.Group startsTrue or FalseTrue, unselectedFalse, unselected

Decide if the following statement about functions is true or false:All relations are functions.

1/1

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.