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" 22) "y=(e^(x)-e^(-x))/(e^(x)+e^(-x)),P...

" 22) "y=(e^(x)-e^(-x))/(e^(x)+e^(-x)),PT(dy)/(dx)=1-y^(2)

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If y=(e^(x)-e^(-x))/(e^(x)+e^(-x)), prove that (dy)/(dx)=1-y^(2)

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