1/(2/3)/(3/4)/.../（4011/4012）=急

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1/(2/3)/(3/4)/.../（4011/4012）=
急

=1×3/2×4/3×……×4012/4011
约分
=1/2×4012
=2006

=1*(3/2)*(4/3)*...*(4012/4011)=2006

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