Edexcel FP3 2009 June — Question 1

Exam BoardEdexcel
ModuleFP3 (Further Pure Mathematics 3)
Year2009
SessionJune
TopicHyperbolic functions
  1. Solve the equation
$$7 \operatorname { sech } x - \tanh x = 5$$ Give your answers in the form \(\ln a\) where \(a\) is a rational number.
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