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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

Question

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 starts
True or False
True, unselected
False

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Solution

To determine whether gf={(1,3),(3,1),(4,3)} g \circ f = \{(1, 3), (3, 1), (4, 3)\} is true or false, we need to find the composite function gf g \circ f by applying the function f f first, and then applying g g to the results.

Step 1: Break Down the Problem

  • We will use the pairs in f f to find the resulting outputs.
  • Then, for each output from f f , we will use those as inputs for g g .

Step 2: Relevant Concepts

  • The notation gf g \circ f means applying f f first and then applying g g to the results of f f .

Step 3: Analysis and Detail

  1. Apply f f :

    • From f={(1,2),(3,5),(4,1)} f = \{(1, 2), (3, 5), (4, 1)\} :
      • f(1)=2 f(1) = 2
      • f(3)=5 f(3) = 5
      • f(4)=1 f(4) = 1
  2. Apply g g :

    • Now, we take the outputs from f f and apply g g :
    • For f(1)=2 f(1) = 2 :
      • g(2)=3 g(2) = 3 → gives the pair (1,3) (1, 3)
    • For f(3)=5 f(3) = 5 :
      • g(5)=1 g(5) = 1 → gives the pair (3,1) (3, 1)
    • For f(4)=1 f(4) = 1 :
      • g(1)=3 g(1) = 3 → gives the pair (4,3) (4, 3)

Combining these results, we find: gf={(1,3),(3,1),(4,3)} g \circ f = \{(1, 3), (3, 1), (4, 3)\}

Step 4: Verify and Summarize

  • We have matched each input from f f and found the corresponding outputs via g g .
  • The resulting composite function gf g \circ f indeed equals {(1,3),(3,1),(4,3)} \{(1, 3), (3, 1), (4, 3)\} .

Final Answer

True

This problem has been solved

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