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Nilai dari: ( a 8 1 ​ + a − 8 1 ​ ) ( a 8 1 ​ − a − 8 1 ​ ) ( a 4 1 ​ + a − 4 1 ​ ) ( a 2 1 ​ + a − 2 1 ​ ) adalah ....

Nilai dari:

 

adalah ....

  1. a plus a to the power of negative 1 end exponent 

  2. a minus a to the power of negative 1 end exponent 

  3. a to the power of 1 half end exponent minus a to the power of negative 1 half end exponent 

  4. a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent 

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M. Evendy

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B.

jawaban yang tepat adalah B.

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Pembahasan

Perhatikan bentuk selisih dua kuadrat berikut! Dengan menerapkan rumus di atas, diperoleh perhitungan sebagai berikut. Jadi,nilai dari adalah . Dengan demikian, jawaban yang tepat adalah B.

Perhatikan bentuk selisih dua kuadrat berikut!

open parentheses a plus b close parentheses open parentheses a minus b close parentheses equals a squared minus b squared 

Dengan menerapkan rumus di atas, diperoleh perhitungan sebagai berikut.

begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis a to the power of 1 over 8 end exponent plus a to the power of negative 1 over 8 end exponent right parenthesis left parenthesis a to the power of 1 over 8 end exponent minus a to the power of negative 1 over 8 end exponent right parenthesis left parenthesis a to the power of 1 fourth end exponent plus a to the power of negative 1 fourth end exponent right parenthesis left parenthesis a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent right parenthesis end cell row blank equals cell open square brackets open parentheses a to the power of 1 over 8 end exponent close parentheses squared minus open parentheses a to the power of negative 1 over 8 end exponent close parentheses squared close square brackets left parenthesis a to the power of 1 fourth end exponent plus a to the power of negative 1 fourth end exponent right parenthesis left parenthesis a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent right parenthesis end cell row blank equals cell left parenthesis a to the power of 1 fourth end exponent minus a to the power of negative 1 fourth end exponent right parenthesis left parenthesis a to the power of 1 fourth end exponent plus a to the power of negative 1 fourth end exponent right parenthesis left parenthesis a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent right parenthesis end cell row blank equals cell open square brackets open parentheses a to the power of 1 fourth end exponent close parentheses squared minus open parentheses a to the power of negative 1 fourth end exponent close parentheses squared close square brackets left parenthesis a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent right parenthesis end cell row blank equals cell left parenthesis a to the power of 1 half end exponent minus a to the power of negative 1 half end exponent right parenthesis left parenthesis a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent right parenthesis end cell row blank equals cell open square brackets open parentheses a to the power of 1 half end exponent close parentheses squared minus open parentheses a to the power of negative 1 half end exponent close parentheses squared close square brackets end cell row blank equals cell a minus a to the power of negative 1 end exponent end cell end table end style 

Jadi, nilai dari begin mathsize 12px style open parentheses a to the power of 1 over 8 end exponent plus a to the power of negative 1 over 8 end exponent close parentheses open parentheses a to the power of 1 over 8 end exponent minus a to the power of negative 1 over 8 end exponent close parentheses open parentheses a to the power of 1 fourth end exponent plus a to the power of negative 1 fourth end exponent close parentheses open parentheses a to the power of 1 half end exponent plus a to the power of negative 1 half end exponent close parentheses end style adalah a minus a to the power of negative 1 end exponent.

Dengan demikian, jawaban yang tepat adalah B.

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