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Jika ( 9 x × b 2 × 7 y ) 4 = 9 20 × b z × 7 8 ,maka nilai x + y + z = ...

Jika , maka nilai x + y + z = ...

  1. 15

  2. 19

  3. 16

  4. 20

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F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

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Pembahasan

left parenthesis 9 to the power of straight x cross times straight b squared cross times 7 to the power of straight y right parenthesis to the power of 4 equals 9 to the power of 20 cross times straight b to the power of straight z cross times 7 to the power of 8 9 to the power of 4 straight x end exponent cross times straight b to the power of 8 cross times 7 to the power of 4 straight y end exponent equals 9 to the power of 20 cross times straight b to the power of straight z cross times 7 to the power of 8  9 to the power of 4 straight x end exponent equals 9 to the power of 20 4 straight x equals 20 straight x equals 5  straight b to the power of 8 equals straight b to the power of straight z straight z equals 8  7 to the power of 4 straight y end exponent equals 7 to the power of 8 4 straight y equals 8 straight y equals 2  Maka comma space straight x plus straight y plus straight z equals 5 plus 2 plus 8 equals 15

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