1.

If f(x)={:{(x^(2)",","for",x ge 0),(x",","for",x lt 0):}, then fof(x) is given by

Answer»

`X^(2)` for `x ge 0, x ` for `x LT 0`
`x^(4)` for `x ge 0, x^(2)` for `x lt 0`
`x^(4)` for `x ge 0, -x^(2)` for `x lt 0`
`x^(4)` for `x ge 0, - x ` for `x lt0`

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