Jawaban:
Un= a + n-1 . b + (n-1)(n-2) c/2
U9= 1 + 8(4) + 8.7. 3/2
= 33 + 82
= 115
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Jawaban:
Un= a + n-1 . b + (n-1)(n-2) c/2
U9= 1 + 8(4) + 8.7. 3/2
= 33 + 82
= 115