Write in set builder form {1,-1,i,-i}
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Posted by Abhishek Kumar 8 years, 4 months ago
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Dharmendra Kumar 8 years, 4 months ago
Set builder form of {1,-1,i,-i} is
A={x: x is the solution of eqaution (x2 -1)(x2 +1)=0}
={x: x is the solution of equation x4 - 1=0} [by using identity (a-b)(a+b)=a2 - b2]
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