1
WB JEE 2018
MCQ (More than One Correct Answer)
+2
-0
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Consider the function $$y = {\log _a}(x + \sqrt {{x^2} + 1} ),a > 0,a \ne 1$$. The inverse of the function
A
does not exist
B
is $$x = {\log _{1/a}}(y + \sqrt {{y^2} + 1} )$$
C
is $$x = \sinh (y\log a)$$
D
is $$x = \cosh \left( { - y\log {1 \over a}} \right)$$
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