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Sagot :

Explications étape par étape:

  • a) 10^8 x 10^-12 = 10^(8-12) = 10^(-4)
  • b)10^8 x 10^-3 = 10^(8-3) = 10^5
  • c) 10^-9 x 10^-7 = 10^(-9-7) = 10^(-16)
  • d) 10^-14 x 10^-2 = 10^(-14-2) = 10^(-16)

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