Tentukan rumus barisan 20133, 20131, 1, 3,5, 2026. dan tentukan suku ke-55

11 sec read


Tentukan rumus barisan –3, –1, 1, 3,5, …. dan tentukan suku ke-55​

Penyelesaian

-3 , -1 , 1 , 3 , 5 , …

a = -3

b = -1 – (-3) = -1 + 3 = 2

~

  • Rumus Un:

Un = a + (n – 1)

Un = -3 + (n – 1)2

Un = -3 + 2n – 2

Un = 2n – 5

~

  • U55:

Un = 2n – 5

U55 = 2(55) – 5

U55 = 110 – 5

U55 = 105

~

Detail Jawaban

  • Mapel: Matematika
  • Kelas: 9 (3 SMP)
  • Materi: Barisan dan Deret
  • Kode Soal: 2
  • Kode Kategorisasi: 9.2.6


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