Diketahui barisan aritmatika berikut (k + 2) , (2k + 4) 7. Tentukan nilai k!
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Jawaban:
b=U2-U1=U3=U2
(2k-4)-(k+2)=7-(2k+4)
k-6= -2k+3
3k = 9
k=9/3
k=3