Deret aritmetika
[tex]sn = \frac{n}{2} (a + un) \\ \\ s5 = \frac{5}{2} (4 + 108) \\ \\ s5 = \frac{5}{2} (112) \\ \\ s5 = 280 \: cm[/tex]
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Deret aritmetika
[tex]sn = \frac{n}{2} (a + un) \\ \\ s5 = \frac{5}{2} (4 + 108) \\ \\ s5 = \frac{5}{2} (112) \\ \\ s5 = 280 \: cm[/tex]