\(\frac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2.12^3}\)
\(=\frac{15^2.16^3.\left(16-15\right)}{12^2.20^2.\left(20-12\right)}\)
\(=\frac{15^2.16^3}{12^2.20^2.8}\)
\(=2\)
học tốt
152 . 164 - 153. 163
= 152.162.(162-15.16)
=(15.16)2.16.(16-15)
=2402.16
=57600.16
= 921600
\(\frac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2.12^3}\)
\(=\frac{15^2.16^3\left(16-15\right)}{12^2\cdot20^2\left(20-12\right)}\)
\(=\frac{15^2.16^2}{12^2.20^2.8}\)
\(=\frac{15.15.16.16}{12.12.20.20.8}\)
\(=\frac{3.5.3.5.4.4.4.4}{3.4.3.4.4.5.4.5.8}\)
\(=\frac{1}{8}\)
Học tốt nhá
