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2. a. Tentukan

2. begin mathsize 14px style f left parenthesis x right parenthesis equals x squared minus 2 comma space g left parenthesis x right parenthesis equals x plus 1 end style
a. Tentukan begin mathsize 14px style left parenthesis f ring operator g right parenthesis left parenthesis negative 2 right parenthesis end style
 

  1. ....space space 

  2. ....space space 

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f ring operator g left parenthesis x right parenthesis end cell equals cell f left parenthesis g left parenthesis x right parenthesis right parenthesis end cell row blank equals cell f left parenthesis x plus 1 right parenthesis end cell row blank equals cell open parentheses x plus 1 close parentheses squared minus 2 end cell row blank equals cell x squared plus 2 x plus 1 minus 2 end cell row blank equals cell x squared plus 2 x minus 1 end cell row blank blank blank row cell f ring operator g left parenthesis negative 2 right parenthesis end cell equals cell left parenthesis negative 2 right parenthesis squared plus 2 left parenthesis negative 2 right parenthesis minus 1 end cell row blank equals cell 4 minus 4 minus 1 end cell row blank equals cell negative 1 end cell end table end style

Jadi, begin mathsize 14px style left parenthesis f ring operator g right parenthesis left parenthesis negative 2 right parenthesis end style adalah -1.

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