Вычеслите1-1/2:2-1/3:3-1/4:... дроби

Question

Вычеслите1-1/2:2-1/3:3-1/4:...
дроби

Answer 1

1-1/2:2-1/3:3-1/4=1-1/2*1/2-1/3*1/3-1/4=1-1/4-1/9-1/4=(36-9-4-9)/36=12/36=1/3

Comments

рад помочь

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сяб