Question: For real number x 3, let f(x) = log2 (log3x) log3 (log2x). Which one of the following is true? (a) f(x) > 0

For real number x ≥ 3, let f(x) = log2 (log3x)

– log3 (log2x). Which one of the following is true?

(a) f(x) > 0 for all x ≥ 3

(b) f(x) < 0 for all x ≥ 3

(c) f(x) = 0 for all x ≥ 3

(d) f(x) = 0 for exactly one vlaue of x ≥ 3

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