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9, 17, 33, 65, ?

A117

B119

C129

D99

Answer:

C. 129

Read Explanation:

→ (9 × 2 -1) = 17 → (17 × 2 -1) = 33 → (33 × 2 -1) = 65 → (65 × 2 -1) = 129


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