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यदि f: R to R तथा g : R to R फलन क्रम...

यदि `f: R to R ` तथा `g : R to R` फलन क्रमश : `f(x) =cos x ` तथा `g(x) = 3x^(2)` द्वारा परिभाषित है तो gof और fog ज्ञात कीजिए | सिद्ध कीजिए `gof ne fog `

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