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calculati 1/63+2/63+3/63.....35/63

Răspuns :


[tex] \frac{1}{63} + \frac{2}{63} + \frac{3}{63} + ... + \frac{35}{63} [/tex]
[tex] \frac{1 + 2 + 3 + ... + 35}{63} = [/tex]
[tex] \frac{35 \times 36 \div 2}{63} [/tex]
[tex] \frac{630}{63 } = 10[/tex]