1.

If the functions f, g, h are defined from 'R' to 'R' by f(x)=x^(2)-1, g(x)=sqrt(x^(2)+1), h(x)={{:(0",","if",xle0),(x",","if",xge0):} then hofog is equal to :

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`X^(2)`
`sqrt(x^(4)-1)`
0
none of these

Answer :A


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