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Question

Write the set builder form A = {-1, 1}.


A

A = {x : x is a real number}

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B

A = {x : x is an integer}

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C

A = {x : x is a root of equation x2=1}

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D

A = {x :x is a root of the equation x2+1=0 }

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Solution

The correct option is C

A = {x : x is a root of equation x2=1}


Basic: Clearly ‘x’ is root of x2=1.


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