Đặt \(A=2+2^2+...+2^{2024}\)
=>\(2A=2^2+2^3+...+2^{2025}\)
=>\(2A-A=2^2+2^3+...+2^{2025}-2-2^2-...-2^{2024}\)
=>\(A=2^{2025}-2\)
\(C=2+2+2^2+2^3+...+2^{2024}\)
\(=2+A=2+2^{2025}-2=2^{2025}\)
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