suku ke 4 dan sku ke 7 brisan masing2 19 dan 37 . jumlah 24 sku prtama

U4 = a + 3b ---> a + 3b = 19 ---> a = 19 - 3b
U7 = a + 6b ---> a + 6b = 37

a + 6b = 37
(19 - 3b) + 6b = 37
3b = 37 - 19
3b = 18
  b = 6

a = 19 - 3b
a = 19 - (6)
a = 19 - 18
a = 1

S24 = 24/2 {2(1) + 23(6)}
S24 = 12{2 + 138}
S24 = 12(140)
S24 = 1680

U4 = a + 3b ---> a + 3b = 19 ---> a = 19 - 3b
U7 = a + 6b ---> a + 6b = 37

a + 6b = 37
(19 - 3b) + 6b = 37
3b = 37 - 19
3b = 18
  b = 6

a = 19 - 3b
a = 19 - (6)
a = 19 - 18
a = 1

S24 = 24/2 {2(1) + 23(6)}
S24 = 12{2 + 138}
S24 = 12(140)
S24 = 1680

                             tolong jadikan aku yang solusi yang etrbaik donk , lagi membutuhkan...................

                               please...........

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