Question

Tính nhanh

\(\frac{2^5.3^7}{2^4.3^6}\)

\(\frac{16^5.9^{10}}{6^{18}}\)

\(\frac{12^5+12^6}{12^6.12^7}-\frac{12^8-12^9}{12^9-13^{10}}\)

Answer 1

a: \(=\dfrac{2^4\cdot3^6\cdot2\cdot3}{2^4\cdot3^6}=6\)

b: \(=\dfrac{2^{20}\cdot3^{20}}{2^{18}\cdot3^{18}}=2^2\cdot3^2=36\)

c: \(=\dfrac{12^5\cdot13}{12^6\cdot13}-\dfrac{12^8\cdot\left(-11\right)}{12^9\cdot\left(-11\right)}=\dfrac{1}{12}-\dfrac{1}{12}=0\)