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Diketahui . Tentukan nilai dari :

Diketahui begin mathsize 14px style f left parenthesis x right parenthesis equals 2 x minus x squared plus 1 space dan space g left parenthesis x right parenthesis equals negative x squared minus 5 x minus 1 end style. Tentukan nilai dari :

begin mathsize 14px style straight b. space open parentheses f minus g close parentheses open parentheses 4 close parentheses end style 

Jawaban:

table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis f minus g right parenthesis left parenthesis x right parenthesis end cell equals cell left parenthesis 2 x minus x squared plus 1 right parenthesis minus left parenthesis negative x squared minus 5 x minus 1 right parenthesis end cell row cell left parenthesis f minus g right parenthesis left parenthesis x right parenthesis end cell equals cell 2 x minus x squared plus 1 plus x squared plus 5 x plus 1 end cell row cell left parenthesis f minus g right parenthesis left parenthesis x right parenthesis end cell equals cell 7 x plus 2 end cell row cell left parenthesis f minus g right parenthesis left parenthesis 4 right parenthesis end cell equals cell 7.4 plus 2 end cell row blank equals 26 end table 

 

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