Penjelasan dengan langkah-langkah:
Un = –2n² + 1
289 = –2n² + 1
2n² = 1 – 289
n² = –288
2
n² = –144
n = √(–144)
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Penjelasan dengan langkah-langkah:
Un = –2n² + 1
289 = –2n² + 1
2n² = 1 – 289
n² = –288
2
n² = –144
n = √(–144)
n = 12i