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Question 1
If $\tan^{-1}(2x) + \tan^{-1}(3x) = \dfrac{\pi}{4}$, then $x$ is:
A.
$\dfrac{1}{6}$
B.
$\dfrac{1}{3}$
C.
$\dfrac{1}{2}$
D.
$\dfrac{1}{4}$
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