Jawab:
Penjelasan dengan langkah-langkah:
U4=7
S6+S8= 26
U20?
S6+S8 = 3(A+U6) + 4(A+U8)
= 3(A+A+5B) +4(A+A+7B)
= 3(2A+5B) + 4(2A+7B)
= 6A+15B + 8A+28B
= 14A+ 43B = 26 ---- pers 1
A + 3B = 7 ---- pers 2
14 A + 43B = 26
14 A + 42B = 98
_____________ -
B = 72
A+3B = 7
A+216 = 7
A= -209
U20 = -209+19.72= 1159
***gtw jawaban gak ada mungkin ada yang kliru ngitung . Sorry ya
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Jawab:
Penjelasan dengan langkah-langkah:
U4=7
S6+S8= 26
U20?
S6+S8 = 3(A+U6) + 4(A+U8)
= 3(A+A+5B) +4(A+A+7B)
= 3(2A+5B) + 4(2A+7B)
= 6A+15B + 8A+28B
= 14A+ 43B = 26 ---- pers 1
A + 3B = 7 ---- pers 2
14 A + 43B = 26
14 A + 42B = 98
_____________ -
B = 72
A+3B = 7
A+216 = 7
A= -209
U20 = -209+19.72= 1159
***gtw jawaban gak ada mungkin ada yang kliru ngitung . Sorry ya