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If f:RrarrR,g:RrarrR are defined by f(x)...

If `f:RrarrR,g:RrarrR` are defined by `f(x)=3x-1 and g(x)=x^(2)+1` , then find
`(i) fof(x^(2)+1)`
`(ii) fog(2) `
`(iii) gof(2a-3)`

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