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Indices, SMB-007

Solve the equation  `3^(-4x) = 9^(6-x)`  for  `x.`  (2 marks)

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`-6`

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`3^(-4x)` `= (3^2)^(6-x)`
`3^(-4x)` `=3^(12-2x)`
` -4x` `= 12-2x`
 `2x` `=-12`
 `:. x` `=-6`

Filed Under: Indices Tagged With: num-title-ct-pathb, smc-4228-15-Indices unknown

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