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Jika  dan . Tentukan .

Jika begin mathsize 14px style f open parentheses x close parentheses equals x minus 5 end style dan begin mathsize 14px style g open parentheses x close parentheses equals 2 x plus 6 end style. Tentukan begin mathsize 14px style open parentheses g ring operator f close parentheses open parentheses x close parentheses end style.

Jawaban:

begin mathsize 14px style open parentheses g ring operator f close parentheses open parentheses x close parentheses equals g open parentheses f open parentheses x close parentheses close parentheses space space space space space space space space space space space space space space space equals g open parentheses x minus 5 close parentheses space space space space space space space space space space space space space space space equals 2 open parentheses x minus 5 close parentheses plus 6 space space space space space space space space space space space space space space space equals 2 x minus 10 plus 6 space space space space space space space space space space space space space space space equals 2 x minus 4 end style 

Jadi, begin mathsize 14px style open parentheses g ring operator f close parentheses open parentheses x close parentheses equals 2 x minus 4 end style.

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