Jawabanmu

2014-03-17T19:49:30+07:00
U10 = a + 9b = 41
u5 = a + 4b = 21
              5b = 20
                b = 4
u5 = a + 16 = 21
       a= 21- 16
       a = 5
u26 = 5 + 25(4)
      = 105
semoga benar :)
2014-03-17T19:51:03+07:00
U₁₀ = 41    U₅ = 21
U₁₀ - U₅ = a + 9b - (a + 4b)
41 - 21 = 5b
20 = 5b
4 = b
21 = a + 4(4)
21 = a + 16
5 = a
U₂₆ = 5 + 25(4) = 5 + 100 = 105
1 5 1