ta có : 6771*8330=(6770+1)*8331=6770*8331+8331

6770*8331=6770*(8330+1)=6770*8330+6770

vậy 6771*8330>6770*8331

cái quý nhất của con trai là ngọc trai

Ta co: C=\(\frac{98^{99}+1}{98^{89}+1}>\frac{98^{99}+1+97}{98^{89}+1+97}=\frac{98^{99}+98}{98^{89}+98}=\frac{98\left(98^{98}+1\right)}{98\left(98^{88}+1\right)}=\frac{98^{98}+1}{98^{88}+1}=D\)

Vay C>D

Metting

198=2.3².11

156=2².3.13

=>BCNN(198;156)=2².3².11.13=5148