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Question

If A={x:xR, x2=16 and 2x=6}, then A = ___.


  1. {∅}

  2. {3}

  3. {-4, 3, 4}


Solution

The correct option is A


x2=16x=±4

2x=6  x=3

There is no value of x which satisfies both of the above equations.

Thus, A = ∅ or {  }.

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