【GMAT考满分数学PS题库】If $${9}{x}={27}^{y}$$, which of the following exp_真题_答案_解析 GMAT考满分官网

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题目内容

If

${9}{x}={27}^{y}$ , which of the following expresses x in terms of y?

${3}^{y}$
${3}^{y-1}$
${3}^{{2}{y}-{1}}$
${3}^{{2}{y}-{3}}$
${3}^{{3}{y}-{2}}$

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正确答案: E

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