Question

rut gon bieu thuc

3(2^2+1).(2^4+1)...(2^64+1)+1

Answer 1

\(3\left(2^2+1\right).\left(2^4+1\right)...\left(2^{64}+1\right)+1\)

\(=\left(2^2-1\right)\left(2^2+1\right)\left(2^4+1\right)...\left(2^{64}+1\right)+1\)

\(=\left(2^4-1\right)\left(2^4+1\right)....\left(2^{64}+1\right)+1\)

\(=\left(2^8-1\right).\left(2^8+1\right)\left(2^{16}+1\right)....\left(2^{64}+1\right)+1\)

\(=\left(2^{64}-1\right).\left(2^{64}+1\right)+1\)

\(=2^{64}-1+1=2^{64}\)

Vậy : \(3\left(2^2+1\right).\left(2^4+1\right)...\left(2^{64}+1\right)+1=2^{64}\)