Jawabanmu

2014-08-16T09:14:13+07:00
A+10b = 127
a+20b =247
dikurangkan
10b = 120
b = 2
a = 107
suku ke -15
107 + 14(2) = 107 +28
                    = 135
2014-08-16T09:16:53+07:00
U₁₁ = 127 => a+10b = 127
U₂₁ = 247 => a+20b = 247
U₁₅? => a+14

a+10b = 127
a+20b = 247 ₋
-10b = -120
b = 12

a+10b = 127
a+10(12) = 127
a+120 = 127
a = 127-120
a = 7

U₅ = a+14b
= 7+14(12)
= 7+168
= 175

semoga memabantuu...
Ga ada jwabanya ka ..
a.183 b.184 c.185 d.186 e.187
soalnya benar ga? takutnya ada yg salah tulis?
periksa lg de., soalnya