1.

cosech-1x =

A. ln(1/x +√(1+x2))/|x|
B. ln(1/x +√(1-x2))/|x|
C. 1/2ln(1+x/1-x)
D. ln(x+√(x2)) +1
Answer» B. ln(1/x +√(1-x2))/|x|


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