Menentukan beda (b)
b = -12 - (-8)
b = -12 + 8
b = -4
..
Menentukan suku ke 100
Un = a + (n - 1)b
U100 = -8 + (100 - 1)-4
U100 = -8 + (99)-4
U100 = -8 - 396
U100 = -404
Diketahui barisan -8, -12, -16, -20, ...
Suku ke-100 ?
- -
a = - 8
b = - 4
Un = a + ( n - 1 ) ( b )
U100 = - 8 + ( 100 - 1 ) ( - 4 )
U100 = - 8 + 99 ( - 4 )
U100 = - 8 + ( 99 × ( - 4 ))
U100 = - 8 + ( - 396 )
U100 = - 404
Maka suku ke-100 barisan tsb adlh - 404 『 B. 』
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Menentukan beda (b)
b = -12 - (-8)
b = -12 + 8
b = -4
..
Menentukan suku ke 100
Un = a + (n - 1)b
U100 = -8 + (100 - 1)-4
U100 = -8 + (99)-4
U100 = -8 - 396
U100 = -404
Diketahui barisan -8, -12, -16, -20, ...
Suku ke-100 ?
- -
a = - 8
b = - 4
Un = a + ( n - 1 ) ( b )
U100 = - 8 + ( 100 - 1 ) ( - 4 )
U100 = - 8 + 99 ( - 4 )
U100 = - 8 + ( 99 × ( - 4 ))
U100 = - 8 + ( - 396 )
U100 = - 404
Maka suku ke-100 barisan tsb adlh - 404 『 B. 』