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Jika 8 1 a − b .4 5 a + b = 135 ​ , maka nilai 7a - b = ...

Jika , maka nilai 7a - b = ...

  1. 1/2

     

  3. 3/2

  4. 2

  5. 3

     

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A. Acfreelance

Master Teacher

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Pembahasan

begin mathsize 14px style 81 to the power of straight a minus straight b end exponent.45 to the power of straight a plus straight b end exponent equals square root of 135 open parentheses 3 to the power of 4 close parentheses to the power of straight a minus straight b end exponent. open parentheses 3 squared.5 close parentheses to the power of straight a plus straight b end exponent equals open parentheses 3 cubed.5 close parentheses to the power of 1 half end exponent 3 to the power of 4 straight a minus 4 straight b end exponent open parentheses 3 squared close parentheses to the power of straight a plus straight b end exponent.5 to the power of straight a plus straight b end exponent equals open parentheses 3 cubed close parentheses to the power of 1 half end exponent.5 to the power of 1 half end exponent 3 to the power of 4 straight a minus 4 straight b end exponent.3 to the power of 2 straight a plus 2 straight b end exponent.5 to the power of straight a plus straight b end exponent equals 3 to the power of 3 over 2 end exponent.5 to the power of 1 half end exponent 3 to the power of 4 straight a minus 4 straight b plus 2 straight a plus 2 straight b end exponent.5 to the power of straight a plus straight b end exponent equals 3 to the power of 3 over 2 end exponent.5 to the power of 1 half end exponent 3 to the power of 6 straight a minus 2 straight b end exponent.5 to the power of straight a plus straight b end exponent equals 3 to the power of 3 over 2 end exponent.5 to the power of 1 half end exponent Maka stack table row cell 6 straight a minus 2 straight b equals 3 over 2 end cell row cell bottom enclose straight a plus straight b equals 1 half end enclose end cell end table with blank below subscript plus space space 7 straight a minus straight b equals 2 end style

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