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If f:R to R be defined by f(x) = (x)/(...

If `f:R to R ` be defined by `f(x) = (x)/(sqrt(1 +x^(2) )),` then `(fofof)(x)= …………. .`

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The correct Answer is:
`(fofof)(x)=(x)/(sqrt(3x^(2)+1))`
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