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1/1+√2 + 1/√2+√3 + 1/√3+√4 + 1/√4+√5 + 1/√5+√6 =
=1+√2+√2/2+√3+√3/3+√4+√4/4+√5+√5/5+√6=
=1+3/2*√2+4/3*√3+5/4*√4+6/5*√5+√6=
=3i1/2+3/2*√2+4/3*√3+6/5*√5+√6
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1/1+√2 + 1/√2+√3 + 1/√3+√4 + 1/√4+√5 + 1/√5+√6 =
=1+√2+√2/2+√3+√3/3+√4+√4/4+√5+√5/5+√6=
=1+3/2*√2+4/3*√3+5/4*√4+6/5*√5+√6=
=3i1/2+3/2*√2+4/3*√3+6/5*√5+√6