计算:1+10 + 4(10/35) + 2 (24/63) + 1 (51/99) + 1 (7/143) =

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计算:1+10 + 4(10/35) + 2 (24/63) + 1 (51/99) + 1 (7/143) =
计算:1+10 + 4(10/35) + 2 (24/63) + 1 (51/99) + 1 (7/143) =

计算:1+10 + 4(10/35) + 2 (24/63) + 1 (51/99) + 1 (7/143) =
=1+150/(3*5)+150/(5*7)+150/(7*9)+150/(9*11)+150/(11*13)
=1+75*(1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11+1/11-1/13)
=1+25-75/13
=263/13

=13.468864468864