Verified Answer :

caylus

Hello,

\(a_{0}=2\)
\(a_{1}=2*(-2)=-4\)
\(a_{2}=2*(-2)^2=2*4=8\)
\(a_{3}=2*(-2)^3=2*(-8)=-16\)

\(a_{n}=2*(-2)^{n}\)

\(a_{20}=2*(-2)^{20}=2*1048576=2097152\)

Answer B








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