Roboguru

Jika  dan , rumus komposisi

Jika begin mathsize 14px style f open parentheses x close parentheses equals 5 x plus 3 end style dan begin mathsize 14px style g open parentheses x close parentheses equals x squared minus x minus 8 end style, rumus komposisi begin mathsize 14px style open parentheses f ring operator g close parentheses open parentheses x close parentheses equals... end style 

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses f ring operator g close parentheses open parentheses x close parentheses end cell equals cell f open parentheses g open parentheses x close parentheses close parentheses end cell row cell space space space space space space space space space space space space space space space end cell equals cell f open parentheses x squared minus x minus 8 close parentheses end cell row cell space space space space space space space space space space space space space space space end cell equals cell 5 open parentheses x squared minus x minus 8 close parentheses plus 3 end cell row cell space space space space space space space space space space space space space space space end cell equals cell 5 x squared minus 5 x minus 40 plus 3 end cell row cell space space space space space space space space space space space space space space space end cell equals cell 5 x squared minus 5 x minus 37 end cell end table end style 

Jadi, rumus komposisi begin mathsize 14px style open parentheses f ring operator g close parentheses open parentheses x close parentheses equals 5 x squared minus 5 x minus 37 end style

 

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