Question

a )\(8^7-2^{18}:14\)

b)\(10^6-5^7:59\)

c) \(5^5-3^4+5^3\)

d)\(3^{n+3}+3^{x+1}+2^{n+3}+2^{n+2}:6\)

mik cần gấp trong giờ này 

Answer 1

\(a,8^7-2^{18}=2^{21}-2^{18}=2^{17}\left(2^4-2\right)=14.2^7⋮14\)

\(b,10^6-5^7=2^6.5^6-5^7=5^6\left(2^6-5\right)=59.5^6⋮59\)

c ko nói chia hết cho số nào

\(d,3^{n+3}+3^{n+1}+2^{n+3}+2^{n+2}\)

\(=3^{n+1}\left(3^2+3\right)+2^{n+1}\left(2^2+2\right)\)

\(=3^{n+1}.12+2^{n+1}.6\)

\(=6.\left(3^{n+1}.2+2^{n+1}\right)⋮6\)

Answer 2

Gấp quá nên viết thiếu đề câu c, viết sai đề câu d