Question

rút gon: C=12(5^2+1)(5^4+1)(5^8+1)(5^16+1)

Answer 1

\(C=12\left(5^2+1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)

\(=\frac{1}{2}\left(5^2-1\right)\left(5^2+1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)

\(=\frac{1}{2}\left(5^4-1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)

\(=\frac{1}{2}\left(5^8-1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)

\(=\frac{1}{2}\left(5^{16}-1\right)\left(5^{16}+1\right)\)

\(=\frac{1}{2}\left(5^{32}-1\right)\)

\(=\frac{5^{32}-1}{2}\)

Answer 2

Đinh Đức Hùng lấy 5² -1 ở đâu đấy

Answer 3

Lấy xong rồi thì phải chia lại chứ

Answer 4

\(12=\frac{1}{2}\left(5^2-1\right)\) nha

Answer 5

12=\(\frac{1}{2}\)+25-1 = \(\frac{1}{2}\)+(5²-1)

\(\frac{1}{2}\)\(\frac{1}{2}\)