Question

2²⁰ x 9³ cộng 15 x 4⁹ x 81²

6⁸ x 2¹¹ cộng 12¹⁰

Mn giúp mk với

mơn nhìu nha

Answer 1

\(\frac{2^{20}.9^3+15.4^9.81^2}{6^8.2^{11}+12^{10}}\)

\(=\frac{2^{20}.3^6+5.2^{18}.3^9}{2^{19}.3^8+2^{20}.3^{10}}\)

\(=\frac{2^{18}.3^6.\left(2^2+5.3^3\right)}{2^{19}.3^8.\left(1+2.3^2\right)}=\frac{139}{2.3^2.19}=\frac{139}{342}\)

Answer 2

CÔNG CHÚA ORI bạn có thể ghi bước trung gian đoạn cuối giúp mk đc ko??? Mk ko hỉu cho lắm

Answer 3

\(\frac{2^{20}.9^3+15.4^9.81^2}{6^8.2^{11}+12^{10}}\)

\(=\frac{2^{20}.3^6+3.5.2^{18}.3^8}{2^8.3^8.2^{11}+4^{10}.3^{10}}\)

\(=\frac{2^{20}.3^6+2^{18}.3^9.5}{2^{19}.3^8+2^{20}.3^{10}}\)

\(=\frac{2^{18}.3^6\left(2^2+3^3.5\right)}{2^{19}.3^8\left(1+2.3^2\right)}\)

\(=\frac{4+27.5}{2.3^2\left(1+18\right)}\)

\(=\frac{4+135}{18.19}\)

\(=\frac{139}{342}\)