B. 6x
ExplanationStep 1: Identify constant multiple rule. Step 2: By constant multiple rule 3×2x=6x. so the correct option follows. Step 3: In exam questions apply the formula first.
Step 1: constant multiple rule पहचानें। Step 2: constant multiple rule से 3×2x=6x मिलता है। इसलिए सही विकल्प मिलता है। Step 3: ऐसे प्रश्नों में पहले सूत्र लगाएँ।
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