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Question

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


A

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B

{∅}

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C

{3}

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D

{-4, 3, 4}

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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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