Respuesta :

We want to find all 4^x less than 1000 and greater than or equal to 4. They are 4, 4*4, 4*4*4... or 4, 16, 64, 256.

AL2006
(4⁰  =  1  too small)

4¹  =  4

4² = 16

4³ = 64

4⁴ = 256

(4⁵ = 1,024  too big)

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