Sn=3n²+16n Un=.........?
Matematika
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Pertanyaan
Sn=3n²+16n
Un=.........?
Un=.........?
1 Jawaban
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1. Jawaban khominghoo
Sn = 3n² + 16n
S3 = 27 + 48 = 75
S2 = 12 + 32 = 44
S1 = 3 + 16 = 19
U3 = 75-44 = 31
U2 = 44-19 = 25
U1 = 19
b = 31-25 = 6
Un = 19-6 + 6n
Un = 6n + 13