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Verified answer
Materi : Pola barisan bilanganKelas : IX
U10 = a + (b1 + b2 + b3 + b4 + ... + b9)
= 15 + (9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25)
= 15 + 153
= 168
Jadi, U10 = 168