Penjelasan dengan langkah-langkah:
a) a = 17 , b = 10
U20 = a + 19•b
U20 = 17 + 19•10
U20 = 17 + 190
U20 = 207
b) a = -4 , b = 5
U21 = a + 20•b
U21 = -4 + 20•5
U21 = -4 + 100
U21 = 96
c) a = 48 , b = -16
U101 = a + 100•b
U101 = 48 + 100•[-16]
U101 = 48 - 1600
U101 = -1552
Jawab:
a. 17, 27, 37, 47, ........., u₂₀
a=17, b=10
Un=17+10(n-1)
=17+10n-10
=10n+7
Maka U20 = 10*20+7
=207
b.-6, -1, 4, 9, 14, ........, u₂₁
a= -6, b=5
Un = -6+5(n-1)
= -6+5n-5
= 5n -11
U21=5*21-11
=105-11 = 94
c.48, 32, 16, 0, -16, ........, u₁₀₁
a=48 b = -16
Un = 48 + (-16)(n-1)
= 48 - 16n + 16
= 64 - 16n
U101 = 64 - 16*101
= 64 - 1616
= -1552
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Penjelasan dengan langkah-langkah:
a) a = 17 , b = 10
U20 = a + 19•b
U20 = 17 + 19•10
U20 = 17 + 190
U20 = 207
b) a = -4 , b = 5
U21 = a + 20•b
U21 = -4 + 20•5
U21 = -4 + 100
U21 = 96
c) a = 48 , b = -16
U101 = a + 100•b
U101 = 48 + 100•[-16]
U101 = 48 - 1600
U101 = -1552
Jawab:
Penjelasan dengan langkah-langkah:
a. 17, 27, 37, 47, ........., u₂₀
a=17, b=10
Un=17+10(n-1)
=17+10n-10
=10n+7
Maka U20 = 10*20+7
=207
b.-6, -1, 4, 9, 14, ........, u₂₁
a= -6, b=5
Un = -6+5(n-1)
= -6+5n-5
= 5n -11
U21=5*21-11
=105-11 = 94
c.48, 32, 16, 0, -16, ........, u₁₀₁
a=48 b = -16
Un = 48 + (-16)(n-1)
= 48 - 16n + 16
= 64 - 16n
U101 = 64 - 16*101
= 64 - 1616
= -1552