Multiple choice technology

The result of the following polish notation *-567

  1. 23

  2. -7

  3. 5

  4. 37
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B Correct answer
Explanation

Polish notation (prefix) *-567 is evaluated as: (5-6) * 7. First, the subtraction 5-6 = -1. Then, -1 * 7 = -7. The operators precede their operands in this notation.

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