Math, asked by dipannita2410, 2 months ago

18, 35, 69, 137 find the sequence

Answers

Answered by subhankar2104

13

Answer:

35 = 18*2 - 1

69 = 35*2 - 1

137 = 69*2 - 1

X = 137*2 - 1

X = 273

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