حاصل عبارت $ (۱+\frac{۱}{۲})(۱+\frac{۱}{۳})(۱+\frac{۱}{۴})...(۱+\frac{۱}{n}) $ کدام است؟
$ (1+\frac{1}{2})(1+\frac{1}{3})(1+\frac{1}{4})...(1+\frac{1}{n}) = (\frac{3}{2})(\frac{4}{3})(\frac{5}{4})...(\frac{n+1}{n})=\frac{n+1}{2} $