Please help me understand how to solve:   22n  +1 the answer has to be a composite number

PREALGEBRA
15th Edition
ISBN:9781938168994
Author:OpenStax
Publisher:OpenStax
Chapter3: Integers
Section3.5: Solve Equations Using Integers; The Division Property Of Equality
Problem 350E: Suppose you are using envelopes and counters to model solving the equations x+4=12and 4x=12. Explain...
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Please help me understand how to solve:   22n  +1

the answer has to be a composite number

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