1.

If the following functions functions are defined from [-1, 1] to [-1, 1], select those which are not bijective.

Answer»

`sin(sin^(-1)X)`
`2/pi sin^(-1)(sin x)`
`(sgn(x))ln(e^(x))`
`x^(3)(sgn(x))`

ANSWER :B::C::D


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