Mathematics
Functions
Easy

Question

f = {(1, a), (2, b), (3, d), (4, c), (5, +), (+ 6)}
The value of f(+) is

  1. 5
  2. c
  3. 6
  4. d

The correct answer is: 6

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text  If  end text f colon R not stretchy rightwards arrow R comma f left parenthesis x right parenthesis equals x cubed plus 3 comma text  and  end text g colon R not stretchy rightwards arrow R comma g left parenthesis x right parenthesis equals 2 x plus 1 text  then  end text f to the power of negative 1 end exponent o g to the power of negative 1 end exponent left parenthesis 23 right parenthesis text  equals  end text

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