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Bilangan bulat terbesar yang memenuhi pertidaksamaan adalah ....

Bilangan bulat terbesar yang memenuhi pertidaksamaan begin mathsize 14px style open parentheses cube root of 1 over 16 end root close parentheses to the power of 6 italic x end exponent greater than open parentheses 2 to the power of italic x minus sign 5 end exponent over 2 squared close parentheses squared middle dot fourth root of 1 over 32 end root end style adalah ....

  1. -2

  2. -1

  3. 1

  4. 2

  5. 3

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M. Robo

Master Teacher

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Pembahasan

Perhatikan bahwa Karena 2 > 1, maka Perhatikan bahwa bilangan bulat terbesar yang kurang dari adalah 1 . Maka, bilangan bulat terbesar yang memenuhi pertidaksamaan adalah 1 .

Perhatikan bahwa

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses cube root of 1 over 16 end root close parentheses to the power of 6 x end exponent end cell greater than cell open parentheses 2 to the power of x minus 5 end exponent over 2 squared close parentheses squared times fourth root of 1 over 32 end root end cell row cell open parentheses cube root of 1 over 2 to the power of 4 end root close parentheses to the power of 6 x end exponent end cell greater than cell open parentheses 2 to the power of x minus 5 end exponent over 2 squared close parentheses squared times fourth root of 1 over 2 to the power of 5 end root end cell row cell open parentheses cube root of 2 to the power of negative 4 end exponent end root close parentheses to the power of 6 x end exponent end cell greater than cell open parentheses 2 to the power of x minus 5 minus 2 end exponent close parentheses squared times fourth root of 2 to the power of negative 5 end exponent end root end cell row cell open parentheses 2 to the power of negative 4 over 3 end exponent close parentheses to the power of 6 x end exponent end cell greater than cell open parentheses 2 to the power of x minus 7 end exponent close parentheses squared times 2 to the power of negative 5 over 4 end exponent end cell row cell 2 to the power of negative 8 x end exponent end cell greater than cell 2 to the power of 2 x minus 14 end exponent times 2 to the power of negative 5 over 4 end exponent end cell row cell 2 to the power of negative 8 x end exponent end cell greater than cell 2 to the power of 2 x minus 14 minus 5 over 4 end exponent end cell row cell 2 to the power of negative 8 x end exponent end cell greater than cell 2 to the power of 2 x minus 61 over 4 end exponent end cell row blank blank blank end table end style 

Karena 2 > 1, maka

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell negative 8 x end cell greater than cell 2 x minus 61 over 4 end cell row cell negative 8 x minus 2 x end cell greater than cell negative 61 over 4 end cell row cell negative 10 x end cell greater than cell negative 61 over 4 end cell row x less than cell 61 over 40 end cell row x less than cell 1 21 over 40 end cell end table end style 

Perhatikan bahwa bilangan bulat terbesar yang kurang dari begin mathsize 14px style 1 21 over 40 end style adalah 1 .

Maka, bilangan bulat terbesar yang memenuhi pertidaksamaan begin mathsize 14px style open parentheses cube root of 1 over 16 end root close parentheses to the power of 6 x end exponent greater than open parentheses 2 to the power of x minus 5 end exponent over 2 squared close parentheses squared times fourth root of 1 over 32 end root end style adalah 1 .

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