- #1
kd001
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Homework Statement
Evalutate the limit, as x approaches 0, log(coshx)/x2
Homework Equations
L'Hopital's rule
The Attempt at a Solution
I can get as far as (sinhx.cosh-1x)/2x by differentiating the top and bottom separately. I'm not sure how to do the next differentiation.
Thanks for any help.