Materi : Barisan dan Geometri
Pola barisan bertingkat
5, 7, 11, ... [ a = 5 ]
+2, +4, ... [ b = 2 ]
+2, ... [ c = 2 ]
Rumus pola : Un = n² - n + 5
Maka U25
= 25² - 25 + 5
= 625 - 25 + 5
= 600 + 5
= 605
Semoga bisa membantu
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Materi : Barisan dan Geometri
Pola barisan bertingkat
5, 7, 11, ... [ a = 5 ]
+2, +4, ... [ b = 2 ]
+2, ... [ c = 2 ]
Rumus pola : Un = n² - n + 5
Maka U25
= 25² - 25 + 5
= 625 - 25 + 5
= 600 + 5
= 605
Semoga bisa membantu