Friday, October 14, 2011

Find the limit

Given,


sech(x)


to find the value of sechx


we need to find the value of


sechx and sechx


so,


the value of


sechx is as x tends to negative infinity the sech(x) -> 0


and similarly as


sechx is as x tends to positive infinity the sech(x) -> 0


So,


sechx sechx


the limit exits forsechx 


and the value issechx=0

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