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SMO 2010 Senior Round 1 Question 14

SMO · SMO 2010 Senior Round 1

Question 14

If $a>b>1$ and

$$\frac1{\log_a b}+\frac1{\log_b a}=\sqrt{1229},$$

find the value of $\dfrac1{\log_{ab}b}-\dfrac1{\log_{ab}a}$.