å¨å¦college algebraä¹ï¼
(-inf, 2) U (2, inf)ï¼ infå°±æ¯é£ä¸ªinfinity
Basically u need to substitute x in f(x) using g(x). after that you should get ((2x-7)-2)/((2x-7)+3), where the denominator cannot be equal to zero. besides that, x can be all real numbers. so the domain of f(g(x)) is (-inf, 2) U (2, inf).
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