Deret (matematika): Perbedaan antara revisi

Berapa nilai dari <math>\frac{1}{4 \cdot 5} + \frac{1}{5 \cdot 6} + \frac{1}{6}</math>?

: <math>\frac{1}{4 \cdot 5} + \frac{1}{5 \cdot 6} + \frac{1}{6} = \frac{1}{20} + \frac{1}{30} + \frac{1}{6} = \frac{3}{60} + \frac{2}{60} + \frac{10}{60} = \frac{15}{60} = \frac{1}{4}</math>

 

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