Question

Помогите с решением

Answer 1

$frac{1}{2}* frac{2}{3}* frac{3}{4}* frac{4}{5}*...* frac{28}{29}* frac{29}{30}= frac{1}{30}$

Answer 2

$(1- frac{1}{2} )(1- frac{1}{3} )(1- frac{1}{4} )...(1- frac{1}{30} )= frac{1}{2} cdot frac{2}{3} cdot frac{3}{4} cdot ... cdot frac{29}{30} = frac{1cdot2cdot3cdot...cdot29}{2cdot3cdot4cdot...cdot30} = frac{1}{30}$