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यदि f:R rarrR तथा g:R rarrR फलन क्रमशः f...

यदि `f:R rarrR` तथा `g:R rarrR` फलन क्रमशः `f(x)=cosx` तथा `g(x)=3x^(2)` द्वारा परिभाषित है, तो gof और fog ज्ञात कीजिए । सिद्ध कीजिए कि -
`gof ne fog.`

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