Mechanism of the reaction is:
`A overset(k_(1))rarrB, 2Aoverset(k_(2))rarr C + D`
What is `(-d[A])/(dt)` ?

Explanation

To find the expression for \(-\frac{d[A]}{dt}\) based on the given reaction mechanism, we can break it down step by step.

### Step 1: Identify the reactions
We have two reactions:
1. \( A \overset{k_1}{\rightarrow} B \)
2. \( 2A \overset{k_2}{\rightarrow} C + D \)

### Step 2: Write the rate expressions for each reaction
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