Answer
$$\frac{3}{2(c+d)}$$
Work Step by Step
Dividing by a number is equivalent to multiplying by the reciprocal of the number:
$$\frac{\frac{3}{c+d}}{2}=\frac{3}{(c+d)}\times \frac{1}{2}=\frac{3}{2(c+d)}.$$
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