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माना R वास्तविक संख्याओं का समुच्चय है औ...

माना R वास्तविक संख्याओं का समुच्चय है और फलनों `f : R to R " और " g: R to R` द्वारा दर्शाया गया है। यदि `f(x) = x^2 + 2x - 3 " और " g(x) =x + 2` , तब x का मान क्या है? यदि `f(g(x) ) = g(f(x) ) ` है:

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