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Matematika
turkaa
Pertanyaan
bantu jawab ya kak... Okk
1 Jawaban
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1. Jawaban yessyv
Un = a + (n-1)b
U6 = 18 => a + 5b = 18
U10 = 30 => a + 9b = 30
----------------- -
-4b = -12
b = 3 => a = 3
U1 = 3
U2 = 6
U3 = 9
U4 = 12
|A| = U1.U4 - U2.U3
= 3.12 - 6.9
= 36 - 54
= -18