For a and b, both positive numbers, what is the value of x if ? (1) (2)

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For <em>a</em> and <em>b</em>, both positive numbers, what is the value of <em>x</em> if <img alt='images' src='https://www.fatskills.com/images3/gmat/c0263-02.jpg'/>? (1)<img alt='images' src='https://www.fatskills.com/images3/gmat/c0263-03.jpg'/> (2)<img alt='images' src='https://www.fatskills.com/images3/gmat/c0263-04.jpg'/>