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Diketahui  dan , maka  adalah... .

Pertanyaan

Diketahui begin mathsize 14px style f left parenthesis x right parenthesis equals 2 square root of x squared plus 4 end root end style dan begin mathsize 14px style g open parentheses x close parentheses equals square root of x squared plus 4 end root plus 3 x end style, maka begin mathsize 14px style open parentheses f minus g close parentheses open parentheses x close parentheses end style adalah... .

  1. begin mathsize 14px style square root of x squared plus 4 end root minus 3 x end style 

  2. begin mathsize 14px style negative square root of x squared plus 4 end root plus 3 x end style 

  3. begin mathsize 14px style square root of x squared plus 4 end root plus 3 x end style 

  4. begin mathsize 14px style negative square root of x squared plus 4 end root minus 3 x end style 

  5. begin mathsize 14px style 3 square root of x squared plus 4 end root plus 3 x end style 

Pembahasan Soal:

Diketahui begin mathsize 14px style f left parenthesis x right parenthesis equals 2 square root of x squared plus 4 end root end style dan begin mathsize 14px style g open parentheses x close parentheses equals square root of x squared plus 4 end root plus 3 x end style, maka begin mathsize 14px style open parentheses f minus g close parentheses open parentheses x close parentheses end style sebagai berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses f minus g close parentheses open parentheses x close parentheses end cell equals cell f open parentheses x close parentheses minus g open parentheses x close parentheses end cell row blank equals cell 2 square root of x squared plus 4 end root space minus space open parentheses square root of x squared plus 4 end root space plus 3 x close parentheses end cell row blank equals cell 2 square root of x squared plus 4 end root space minus space square root of x squared plus 4 end root space minus space 3 x end cell row blank equals cell square root of x squared plus 4 end root space minus space 3 x end cell end table end style


Jadi, jawaban yang benar adalah A.
 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 12 April 2021

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