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Pertanyaan

Diketahui g ( x ) = lo g 3 ​ ( 2 x ) + 1 . Nilai dari g − 1 ( 1 ) − g − 1 ( 2 ) + g − 1 ( 3 ) − g − 1 ( 4 ) = ....

Diketahui . Nilai dari ....

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F. Ayudhita

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah C.

jawaban yang tepat adalah C. 

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Ingat! Berdasarkan konsep tersebut diperoleh Dengan demikan, maka Sehingga nilai dari Jadi, jawaban yang tepat adalah C.

Ingat!

begin mathsize 14px style y equals g left parenthesis x right parenthesis space left right arrow space x equals g to the power of negative 1 end exponent left parenthesis y right parenthesis end style 

Berdasarkan konsep tersebut diperoleh

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row y equals cell g left parenthesis x right parenthesis end cell row y equals cell log presuperscript 3 space left parenthesis 2 x right parenthesis plus 1 end cell row cell y minus 1 end cell equals cell log presuperscript 3 space left parenthesis 2 x right parenthesis end cell row cell 3 to the power of y minus 1 end exponent end cell equals cell 2 x end cell row cell 3 to the power of y minus 1 end exponent over 2 end cell equals x end table end style 

Dengan demikan, begin mathsize 14px style g to the power of negative 1 end exponent left parenthesis y right parenthesis equals 3 to the power of y minus 1 end exponent over 2 end style maka

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell g to the power of negative 1 end exponent left parenthesis 1 right parenthesis end cell equals cell 3 to the power of 1 minus 1 end exponent over 2 end cell row blank equals cell 3 to the power of 0 over 2 end cell row blank equals cell 1 half end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell g to the power of negative 1 end exponent left parenthesis 2 right parenthesis end cell equals cell 3 to the power of 2 minus 1 end exponent over 2 end cell row blank equals cell 3 over 2 end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell g to the power of negative 1 end exponent left parenthesis 3 right parenthesis end cell equals cell 3 to the power of 3 minus 1 end exponent over 2 end cell row blank equals cell 3 squared over 2 end cell row blank equals cell 9 over 2 end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell g to the power of negative 1 end exponent left parenthesis 4 right parenthesis end cell equals cell 3 to the power of 4 minus 1 end exponent over 2 end cell row blank equals cell 3 cubed over 2 end cell row blank equals cell 27 over 2 end cell end table end style 

Sehingga nilai dari

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell g to the power of negative 1 end exponent left parenthesis 1 right parenthesis minus g to the power of negative 1 end exponent left parenthesis 2 right parenthesis plus g to the power of negative 1 end exponent left parenthesis 3 right parenthesis minus g to the power of negative 1 end exponent left parenthesis 4 right parenthesis end cell equals cell 1 half minus 3 over 2 plus 9 over 2 minus 27 over 2 end cell row blank equals cell negative 20 over 2 end cell row blank equals cell negative 10 end cell end table end style 

Jadi, jawaban yang tepat adalah C. 

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