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caahta

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Resolva as equações: a) log4(x+3)=1/2 b)log3(x+5)=log3(3-x) c) log7(x+2) + log 7(x-2)=log7 5 d) log2 (x-1) - 2= log2 7
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Resolva a equação exponencial: 3^x+1 + 81/3^x = 36
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