Exercício sobre função exponencial

Resolver, em $\phantom{X}\mathbb{R}\phantom{X}$, as equações a seguir:

$\,log_{\,{}_{\Large 3}\,}(x\,+\,1)\;+\;log_{\,{}_{\Large 3}\,}x\;=\;log_{\,{}_{\Large 3}\,}6\,$

$\,log_{\,{}_{\Large 2}\,}(4x\,-\,7)\;-\;log_{\,{}_{\Large 2}\,}(3x\,-\,1)\;=\;log_{\,{}_{\Large 2}\,}\dfrac{\,1\,}{\,5\,}\,$

$\,log_{\,{}_{\Large 2}\,}(x\,-\,1)\;=\;1\;+\;log_{\,{}_{\Large 2}\,}(x\,+\,2)\,$

resposta: a)$\,\mathbb{S}\,=\,\lbrace \,2\,\rbrace\;$ b)$\,\mathbb{S}\,=\,\lbrace \,2\,\rbrace\;$ c) ∅
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