Multiple choice

Operators $\square$,$\diamond$ and $\rightarrow$ are defined by: a $\square$ b = $\frac{a - b}{a + b}$; a $\diamond$ b = $\frac{a + b}{a - b}$; a $\rightarrow$ b = ab. Find the value of (66 $\square$ 6) $\rightarrow$ (66 $\diamond$ 6).

  1. -2

  2. -1

  3. 1

  4. 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(66 $\square$ 6) $\rightarrow$ (66 $\diamond$ 6)

                 = $\frac{66 - 6}{66 + 6} \times \frac{66 + 6}{66 - 6} = 1$

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