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Diektahui fungsi dan carilah jika diketahui: b.

Diektahui fungsi begin mathsize 14px style f colon R rightwards arrow R end style dan begin mathsize 14px style g colon R rightwards arrow R end style carilah begin mathsize 14px style g ring operator f space dan space f ring operator g end style jika diketahui:

b. begin mathsize 14px style f left parenthesis x right parenthesis equals x minus 2 space dan space g left parenthesis x right parenthesis equals x squared plus 2 x plus 1 end style

 

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Jawaban:

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

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

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