You may be trying hard to make something difficult out of something easy here.
You have said that a(n) = 8n . (I can't write a subscript 'n'on this site either, but 'a(n)' will serve the same purpose.)
So . . . (get ready) . . .
a(n) = (8) times (n) a(1) = 8 a(2) = 16 a(3) = 24 a(4) = 32 a(5) = 40 a(6) = 48 .
. a(100) = 800 a(101) = 808 .
. etc.
The first five terms in the arithmetic sequence given by a n = 8 n are 8, 16, 24, 32, and 40. Each term is obtained by multiplying the index n by 8, where n ranges from 1 to 5. Thus, the sequence reveals a consistent pattern of adding 8 with each subsequent term.
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Jawaban:Harga beli lemari Bu Mawar adalah Rp420.000.Berikut cara menghitungnya:Kita tahu harga jual (Hjual) adalah Rp483.000 dan keuntungannya (K) 15%.Rumus keuntungan adalah:K = Harga Jual − Harga BeliDan keuntungan dalam persentase dari harga beli:Persententase Keuntungan = Keuntungan ÷ Harga Beli × 100%Dari informasi yang diberikan:Hjual = Rp483.000K = 15%Jika harga beli kita anggap 100%, maka harga jual adalah 100% (harga beli) + 15% (keuntungan) = 115% dari harga beli.Jadi, kita bisa tulis:115% × Harga Beli = Rp483.0001.15 × Harga Beli = Rp483.000Untuk mencari harga beli, kita bagi harga jual dengan 1.15:Harga Beli = Rp483.000 ÷ 1.15Harga Beli = Rp 420.000Penjelasan:jawabannya 420.000