U4=33 dan b=5 berapakah u1 dan u10

Dik :
U4 = 33
b = 5

Dit :
U1 & U10 ?

jawab :

U1 = U4 - 3b
U1 = 33 - 3(5)
U1 = 33 - 15
U1 = 18

U10 = U4 + 6b
U10 = 33 + 6(5)
U10 = 33 + 30
U10 = 63

semoga membantu ^_^

U₄ = 33 = a + (n - 1) x b
        33 = a + (4 - 1) x 5
        33 = a + 15
          a = 18

U₁ = a = 18
U₁₀ = a + (n - 1) x b
       = 18 + (10 - 1) x 5
       = 18 + 45
       = 63

semoga jelas dan membantu ya