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Question

If n is an integer, then every integral multiple of 3 can be represented by the expression .
  1. 2n+1
  2. 3n
  3. 2n-1
  4. 6n


Solution

The correct option is B 3n
The first multiple of 3 = 3×1 = 3,
the second multiple of 3 = 3×2 = 6.
Similarly, the nth multiple of 3 = 3×n
                                                = 3n.

Hence, if n is an integer, then every integral multiple of 3 can be represented by the expression 3n.
 

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