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Verified answer
Kelas 9 MatematikaBab Barisan dan Deret Bilangan
Un = Sn - S(n - 1)
U10 = S10 - S9
U10 = (5 . 10² - 7 . 10) - (5 . 9² - 7 . 9)
U10 = (500 - 70) - (405 - 63)
U10 = 430 - 342
U10 = 88