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pola ke-2 = 4² - 2² = 16 - 4 = 12
pola ke-3 = 5² - 3² = 25 - 9 = 16
...
dst
pola ke-10 = 12² - 10² = 144 - 100 = 44
4) 50, 45, 39, 32, 24, 15
6) jumlah bil baris ke-n = 2^n
jumlah bil baris ke-10 = 2¹° = 1024
semoga membantu ya :)
a= 8
b = 4
U10 = a + (n-1)b
= 8 + 9.4
= 8 + 36
= 44(C)
4.
50,45,39,32, 24 dan 15.(A)
U5 dan U6
a= 50
b=- 5
c=1
U5 = 50-20 + (-1(25-15+2)/2 = 24
U6 = 50 - 25 + (-1((36 - 18+2)/2 = 15
6.
rumus Un bilangan pascal U10= =(C)