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1 mark

If , what is the value of ?

  1. A
    20
  2. B
    5
  3. C
    11
  4. D
    12

Solution & Step-by-step Explanation

Based on the defined mathematical operation:


Substituting and :



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Try it yourself before checking the explanation above.

If , what is the value of ?
A
20
B
5
C
11
D
12

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