Barisan: 12,16,20,24 tentukan suku ke -18​

Barisan: 12,16,20,24 tentukan suku ke -18​

Jawaban:

12 , 16 , 20 , 24 , …

 

a = 12

b = 4

 

U18 = a + 17b = 12 + 17(4) = 12 + 68 = 80

 

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