Penjelasan dengan langkah-langkah:
suku pertama (a) = -14
beda (b) = 5
Un = 76
Banyak suku pada barian tsb
Un = a + (n-1) b
76 = -14 + (n-1) 5
76 = -14 +5n -5
76 = -19 + 5n
76 + 19 = 5n
95 = 5n
n = 95/5
n = 19
banyak suku barisan tsb adalah 19
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Penjelasan dengan langkah-langkah:
suku pertama (a) = -14
beda (b) = 5
Un = 76
Banyak suku pada barian tsb
Un = a + (n-1) b
76 = -14 + (n-1) 5
76 = -14 +5n -5
76 = -19 + 5n
76 + 19 = 5n
95 = 5n
n = 95/5
n = 19
banyak suku barisan tsb adalah 19