Penjelasan dengan langkah-langkah:
Deret
a = suku pertama
b = beda suku
n = suku ke-n
rumus b = U2 - U1
1. -6,-2,2,6,10,..........
b = U2 - U1
= -2 -(-6)
= -2 + 6
= 4
U10 = a + (n - 1)b
= -6 + (10 - 1)4
= -6 + 36
= 30
2. U5 = 8
U6 = 11
U5 = a + 4b = 8
U6 = a + 5b = 11
_________-
-b = -3
b = 3
a + 4b = 8
a + 4(3) = 8
a + 12 = 8
a = 8 - 12
a = -4
= -4 + (10 - 1)3
= -4 + 9(3)
= -4 + 27
= 23
3. U3 = 4
U5 = 8
U3 = a + 3b = 4
________-
-b = -4
b = 4
a + 3b = 4
a + 3(4) = 4
a + 12 = 4
a = 4 - 12
a = -8
= -8 + (10 - 1)4
= -8 + 9(4)
= -8 + 36
= 28
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Penjelasan dengan langkah-langkah:
Deret
a = suku pertama
b = beda suku
n = suku ke-n
rumus b = U2 - U1
1. -6,-2,2,6,10,..........
b = U2 - U1
= -2 -(-6)
= -2 + 6
= 4
U10 = a + (n - 1)b
= -6 + (10 - 1)4
= -6 + 36
= 30
2. U5 = 8
U6 = 11
U5 = a + 4b = 8
U6 = a + 5b = 11
_________-
-b = -3
b = 3
a + 4b = 8
a + 4(3) = 8
a + 12 = 8
a = 8 - 12
a = -4
U10 = a + (n - 1)b
= -4 + (10 - 1)3
= -4 + 9(3)
= -4 + 27
= 23
3. U3 = 4
U5 = 8
U3 = a + 3b = 4
U5 = a + 4b = 8
________-
-b = -4
b = 4
a + 3b = 4
a + 3(4) = 4
a + 12 = 4
a = 4 - 12
a = -8
U10 = a + (n - 1)b
= -8 + (10 - 1)4
= -8 + 9(4)
= -8 + 36
= 28