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Materi tentang Barisan dan Deret AritmatikaVerified answer
BaRisan AritMatiKaA][
(K - 3) , K , (K + 3)
U2 - U1 = U3 - U2
K - (K - 3) = (K + 3) - K
K - K + 3 = K + 3 - K
3 = 3
K ---> memenuhi utk semua bilangan real
B][
(8 - 2k) , (2k + 25) , (10 - k)
U2 - U1 = U3 - U2
(2k + 25) - (8 - 2k) = (10 - k) - (2k + 25)
2k + 25 - 8 + 2k = 10 - k - 2k - 25
4k + 17 = -3k - 15
4k + 3k = -17 - 15
7k = -32
k = -32/7