a) 2711 và 818
Ta có :
2711 = ( 33 )11 = 333
818 = ( 34 )8 = 332
Vì 333 > 332 ( 33 > 32 ) Nên 2711 > 818
a) \(27^{11}=\left(3^3\right)^{11}=3^{33}\)
\(81^8=\left(3^4\right)^8=3^{32}\)
vi \(3^{33}>3^{32}\) nen \(27^{11}>81^8\)
b) \(36^9=\left(36^3\right)^3=46656^3\)
\(125^3=125^3\)
vi \(46656^3>125^3\) nen \(36^9>125^3\)
bai 2
a) \(x^5=243\)
\(x^5=3^5\)
\(\Rightarrow x=3\)
vay \(x=3\)
b) \(\left(2x-1\right)^3=125\)
\(\left(2x-1\right)^3=5^3\)
\(\Rightarrow2x-1=5\)
\(\Rightarrow2x=6\)
\(\Rightarrow x=3\)
vay \(x=3\)
c) \(3^{2x+1}=243\)
\(3^{2x+1}=3^5\)
\(\Rightarrow2x+1=5\)
\(\Rightarrow2x=4\)
\(\Rightarrow x=2\)
vay \(x=2\)
dich me cai thang cho,may chui bon no ngu thi may co ngu khong thang co ho
