Jawaban:
U3 = 16
U13 = 66
U1=?
jawab:
Rumus: Un = a + (n-1)b
U3 = a + (3 - 1)b
16 = a + 2b
a = 16 - 2b
U13 = a + (13 - 1)b
66 = 16 - 2b + 12b
66 - 16 = 10b
50 = 10b
50/10 = b
5 = b
a = 16 - 2(5)
a = 16 - 10
a = 6
a = U1 = 6
suku pertama adalah 6 (C)
Penjelasan dengan langkah-langkah:
Diket : U3 = 16
Ditanya : U1?
Jawab :
Rumus aritmetika : Un = a+ (n-1)b
U3 = a +(n-1)b
a+(3-1)b = 16
a+2b = 16
a+(13-1)b = 66
a+12b = 66
a+2b = 16 _
10b = 50
b = 50:10
b = 5
a+2b =16
a+2.5 = 16
a=16-10
U1 = a
U1 = 6
(semoga membantu)
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Jawaban:
U3 = 16
U13 = 66
U1=?
jawab:
Rumus: Un = a + (n-1)b
U3 = a + (3 - 1)b
16 = a + 2b
a = 16 - 2b
U13 = a + (13 - 1)b
66 = 16 - 2b + 12b
66 - 16 = 10b
50 = 10b
50/10 = b
5 = b
a = 16 - 2b
a = 16 - 2(5)
a = 16 - 10
a = 6
a = U1 = 6
suku pertama adalah 6 (C)
Penjelasan dengan langkah-langkah:
Diket : U3 = 16
U13 = 66
Ditanya : U1?
Jawab :
Rumus aritmetika : Un = a+ (n-1)b
U3 = a +(n-1)b
a+(3-1)b = 16
a+2b = 16
U13 = 66
a+(13-1)b = 66
a+12b = 66
a+12b = 66
a+2b = 16 _
10b = 50
b = 50:10
b = 5
a+2b =16
a+2.5 = 16
a=16-10
a = 6
U1 = a
U1 = 6
(semoga membantu)