Pola bilangan segitiga
[tex]un = \frac{n}{2} (n + 1) \\ \\ u10 = \frac{10}{2} (10 + 1) \\ \\ u10 = 5(11) \\ \\ u10 = 55 \\ \\ \\ un = \frac{n}{2} (n + 1) \\ \\ u100 = \frac{100}{2} (100 + 1) \\ \\ u100 = 50(101) \\ \\ u100 = 5.050[/tex]
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Pola bilangan segitiga
[tex]un = \frac{n}{2} (n + 1) \\ \\ u10 = \frac{10}{2} (10 + 1) \\ \\ u10 = 5(11) \\ \\ u10 = 55 \\ \\ \\ un = \frac{n}{2} (n + 1) \\ \\ u100 = \frac{100}{2} (100 + 1) \\ \\ u100 = 50(101) \\ \\ u100 = 5.050[/tex]