Question

Ada yg tau gk No 19 Tolong
Lagi Butuh

Answer 1

Dengan:
U₇ = a+6b = 40
U₄ = a+3b = 19 -
⇒⇒ 3b = 21, sehingga b = 7
Maka,
a+3b = 19
a+3(7) = 19
a + 21 = 19
a = -2

Maka,
a.) a = -2
b.) b = 7
c.)
Nilai U₁₀
= a + 9b
= -2 + 9(7)
= -2 + 63
= 61

Answer 2

U7 = a + 6b = 40
U4 = a + 3b = 19
      --------------------- -
             3b = 21
               b = 21 : 3
               b = 7
   a + 3b = 19
a + 3.(7) = 19
  a + 21  = 19
          a = 19 - 21
          a = - 2
U10 = a + 9.b
       = - 2 + 9.(7)
       = - 2 + 63
       = 61
jadi , a = -2  ; b = 7  ; U10 = 61