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3 marksBinary Operations

CSEC Mathematics · Question 2(a)(ii)

Given that a * b means √(a + 4b), where the positive root is taken.

Determine whether the operation denoted by * is commutative. Justify your answer.

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Other parts of this question

  1. 2(a)(i)Determine the value of 1 * 2.[2 marks]
  2. 2(b)(i)Solve the inequality 3 - 2x > 5.[2 marks]
  3. 2(b)(ii)Represent your answer in (b)(i) on the number line shown below.[1 mark]
  4. 2(c)(i)Let x represent the cost of an adult ticket and y the cost of a ticket for a child. Write TWO equations in x and y to represent the information above.[2 marks]
  5. 2(c)(ii)Solve the equations to determine the cost of an adult ticket.[2 marks]

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