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Complete the series: 2, 5, 9, 19, 37…
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$2 \times 2 + 1 = 5$

$5 \times 2 - 1 = 9$
 

$9 \times 2 + 1 = 19$

$19 \times 2 - 1 = 37$
 

$37 \times 2 +1 = 75$

 

Hence,Next Number will be $75$.
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