Thursday, 27 November 2014

calculus - How find this sum of limntoinftysumnk=1left(frac12ksum2k11i=0lnleft(frac2k+2+2i2k+1+2iright)right)

Find the sum of the limit
limnnk=1(12k2k11i=0ln(2k+2+2i2k+1+2i))



My try: since
2k11i=0ln(2k+2+2i2k+1+2i)=2k11i=0(ln(2k+2+2i)ln(2k+1+2i))




My friend tells me this sum has an analytical solution. But
I can't find it. Thank you.

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