Roboguru

Diketahui . Tentukan .

Diketahui begin mathsize 14px style straight f left parenthesis x right parenthesis equals x squared minus 3 space dan space straight g left parenthesis x right parenthesis equals 2 x minus 4 end style. Tentukan begin mathsize 14px style left parenthesis straight f minus straight g right parenthesis left parenthesis 5 right parenthesis end style.

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Jawaban:

begin mathsize 14px style space space space space end stylebegin mathsize 14px style left parenthesis straight f minus straight g right parenthesis left parenthesis x right parenthesis equals straight f left parenthesis x right parenthesis minus straight g left parenthesis x right parenthesis left parenthesis straight f minus straight g right parenthesis left parenthesis straight x right parenthesis equals left parenthesis straight x squared minus 3 right parenthesis minus left parenthesis 2 straight x minus 4 right parenthesis left parenthesis straight f minus straight g right parenthesis left parenthesis straight x right parenthesis equals straight x squared minus 2 straight x plus 1 left parenthesis straight f minus straight g right parenthesis left parenthesis 5 right parenthesis equals left parenthesis 5 right parenthesis squared minus 2 left parenthesis 5 right parenthesis plus 1 left parenthesis straight f minus straight g right parenthesis left parenthesis 5 right parenthesis equals 16 end style

 

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