September 2018 1 12 Report

1. zastosuj wzór i oblicz.

wzor: \frac{1}{n(n+1)} =\frac{1}{n} - \frac{1}{n+1}

oblicz:

\frac{1}{4*5}+\frac{1}{5*6}+\frac{1}{6*7}+\frac{1}{7*8}+\frac{1}{8*9}+\frac{1}{9*10}+\frac{1}{10*11}=

bardzo prosze o rozwiazanie bi nie rozumiem tego zadania z gory dziekuje : )


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