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Diketahui a , b , dan c adalah bilangan riil positif. Jika 4 a b 3 ​ b c ​ ​ = ab ,maka nilai adalah .... (SBM TPA 2015)

Diketahui  dan  adalah bilangan riil positif. Jika , maka nilai begin mathsize 14px style c end style adalah .... (SBM TPA 2015)

  1. begin mathsize 14px style left parenthesis a b right parenthesis to the power of 5 over 2 end exponent end style 

  2. begin mathsize 14px style left parenthesis a b right parenthesis to the power of 5 over 4 end exponent end style 

  3. begin mathsize 14px style left parenthesis a b right parenthesis to the power of 1 fourth end exponent end style 

  4. begin mathsize 14px style left parenthesis a b right parenthesis to the power of negative 3 over 4 end exponent end style 

  5. begin mathsize 14px style left parenthesis a b right parenthesis to the power of negative 3 over 2 end exponent end style 

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Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah A.

jawaban yang tepat adalah A.

Pembahasan

Perhatikan perhitungan sebagai berikut! Jadi, jawaban yang tepat adalah A.

Perhatikan perhitungan sebagai berikut!

 begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator square root of b c end root over denominator fourth root of a b cubed end root end fraction end cell equals cell a b end cell row cell open parentheses b c close parentheses to the power of begin display style 1 half end style end exponent over open parentheses a b cubed close parentheses to the power of begin display style 1 fourth end style end exponent end cell equals cell a b end cell row cell fraction numerator b to the power of begin display style fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction end style end exponent c to the power of 1 half end exponent over denominator a to the power of 1 fourth end exponent b to the power of 3 over 4 end exponent end fraction end cell equals cell a b end cell row cell a to the power of negative 1 fourth end exponent b to the power of fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction minus 3 over 4 end exponent c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell a b end cell row cell a to the power of negative 1 fourth end exponent b to the power of fraction numerator begin display style 2 end style over denominator begin display style 4 end style end fraction minus 3 over 4 end exponent c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell a b end cell row cell a to the power of negative 1 fourth end exponent b to the power of negative 1 fourth end exponent c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell a b end cell row cell open parentheses a b close parentheses to the power of negative 1 fourth end exponent c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell a b end cell row cell c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell fraction numerator a b over denominator open parentheses a b close parentheses to the power of negative 1 fourth end exponent end fraction end cell row cell c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell open parentheses a b close parentheses open parentheses a b close parentheses to the power of 1 fourth end exponent end cell row cell c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell open parentheses a b close parentheses to the power of 1 plus 1 fourth end exponent end cell row cell c to the power of blank to the power of 1 half end exponent end exponent end cell equals cell open parentheses a b close parentheses to the power of 5 over 4 end exponent end cell row cell open parentheses c to the power of blank to the power of 1 half end exponent end exponent close parentheses squared end cell equals cell open parentheses open parentheses a b close parentheses to the power of 5 over 4 end exponent close parentheses squared end cell row c equals cell open parentheses a b close parentheses to the power of 5 over 4 times 2 end exponent end cell row c equals cell open parentheses a b close parentheses to the power of 5 over 2 end exponent end cell end table end style

Jadi, jawaban yang tepat adalah A.

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