Question

Me ajudem a fazer equação exponenciais

(0,3)^x-5 = 3/10
(1/4)^× = 128​

Answer 1

Resposta:

$(0,3)^{x-5}={3\over10}\\ \\ Sendo~~{3\over10}=0,3\\ \\ (0,3)^{x-5}=0,3^1\\ \\ x-5=1\\ x=1+5\\ x=6\\ \\ S=\{6\}$

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$({1\over4})^x=128\\ \\ ({1\over2^2})^x=2^7\\ \\ (2^{-2})^x=2^7\\ \\ 2^{-2x}=2^7\\ \\ -2x=7~~\times(-1)\\ \\ 2x=-7\\ \\ x=-{7\over2}\\ \\ S=\{{7\over2}\}$