Domain of the Function
Algebra
Level
2
What is the domain of the function ?
1 and -1
All real numbers except 1 and -1
All real numbers except 1
All real numbers except 0,1 and -1
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1 solution
The denominator of the function cannot be 0 .
x 2 − 1 = 0 ⇒ x 2 = 1 ⇒ x = ( + / − ) 1
Hence, Domain D = R − { − 1 , 1 }