Use Common Logarithms to Solve for X in Terms of Y

Use common logarithms to solve for x in terms of y. $y = \frac { e ^ { x } - e ^ { - x } } { e ^ { x } + e ^ { - x } }$

A) $x = 3 \ln \frac { y - 1 } { y + 1 }$
B) $x = \frac { 1 } { 2 } \ln \frac { y + 1 } { 1 - y }$
C) $x = 2 \ln \frac { y - 1 } { y + 1 }$
D) $x = \frac { 1 } { 3 } \ln \frac { y + 1 } { y - 1 }$
E) $x = \ln \frac { y - 1 } { y + 1 }$

Correct Answer:

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