Question: y = ln ( e ^ x + e ^ - x ) Option A 1 Option B ( e ^ x + 1 /

y=ln(e^x+e^-x)
Option A
1
Option B
(e^x+1/e^x)/(e^x-1/e^x)
Option C
(e^x-1/e^x)/(e^x+1/e^x)
Option D
e^x+1/e^x

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