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माना f: IR to IR to IR, तथा g:IR to IR ...

माना `f: IR to IR to IR`, तथा `g:IR to IR` फलन है जिसके द्वारा `f(x)=x^(2)+4x+3` g(x)=2sin x+4 तथा जहाँ IR वास्तविक संख्याओं का समुच्यय है (gof), (x) (fog)x को ज्ञात कीजिएः

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