Question

So sánh

Answer 1

a: \(6^{25}=6^{24}\cdot6\)

mà 6<7

nên \(6^{25}< 7\cdot6^{24}\)

b: \(2^{19}=2^{16}\cdot8\)

mà 11>8

nên \(11\cdot2^{16}>2^{19}\)

 

Answer 2

c)27^5 .49^8

=(3^3)^5 .(7^2)^8

=3^15 .7^16

=21^15 .7 >21^15

Answer 3

c: \(27^5\cdot49^8=3^{15}\cdot7^{16}\)

\(21^{15}=3^{15}\cdot7^{15}\)

mà \(7^{15}< 7^{16}\)

nên \(21^{15}< 27^5\cdot49^8\)