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Verified answer
Bab Barisan Dan DeretSekolah Menengah Pertama Kelas VIII
U2 - U1 = 8 (r)
U50 = U1 + ( r x ( 50 - 1 ) )
U50 = 7 + ( 8 x 49 )
U50 = 7 + 392
U50 = 399
=7+(n-1)8
=7+8n-8
=-1+8n
Cek =
Suku ke-1
-1+8.1=7
Suku ke-2
-1+8.2=15
Suku ke tiga
-1+8.3=23
Suku ke-50
-1+8.50=399