Tentukan angka berikutnya dalam pola barisan: 3, 7, 15, 31, 63, ...

Answer and explanation

Correct answer: C. 127

Pola: ×2 + 1: 3×2+1=7; 7×2+1=15; 15×2+1=31; 31×2+1=63; 63×2+1 = 127.

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