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Verified answer
U3 = a + 2b = 10U9 = a + 8b = 22
-------------------------- -
-6b = -12
b = 2
a + 2b = 10
a + 2.2 = 10
a + 4 = 10
a = 6
Maka,
U30
= a + 29b
= 6 + 29.2
= 6 + 58
= 64
Jawaban : A