please answer this calculus question – Quality Paper Tutor | qualitypapertutor.com

please answer this calculus question – Quality Paper Tutor | qualitypapertutor.com

The two functions f and g defined by f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive. True or False? 

Please explain your answer.

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