5,4999055

5,4999055

\(\frac{428517}{571428}+\frac{30.63.65.8}{117.200.49}+\frac{-525}{100}+\frac{36992}{4046}\)

\(=\)\(\frac{428517}{571428}+\frac{6}{7}+\frac{-21}{4}+\frac{64}{7}\)

Quy đồng mẫu số đc kq cuổi cùng là : 5,4999055

ban don gian cac pso roi cong lai rat de dang

\(=\dfrac{-11}{7}+\dfrac{1}{16}+\dfrac{6}{7}=\dfrac{-5}{7}+\dfrac{1}{16}=\dfrac{-80+7}{112}=\dfrac{-73}{112}\)

\(B=\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}=\frac{\left(2^2\right)^6.\left(3^2\right)^5+\left(2.3\right)^9.2^3.3.5}{\left(2^3\right)^4.3^{12}-\left(2.3\right)^{11}}=\frac{2^{12}.3^{10}+2^9.2^3.3^9.3.5}{2^{12}.3^{12}-2^{11}.3^{11}}=\frac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{11}.3^{11}.\left(2.3-1\right)}=\frac{2^{12}.3^{10}.\left(1+5\right)}{2^{11}.3^{11}.5}\)

=\(\frac{2^{12}.3^{10}.6}{2^{11}.3^{11}.5}=\frac{2^{13}.3^{11}}{2^{11}.3^{11}.5}=\frac{2^2}{5}=\frac{4}{5}\)

ko chép đề

\(=\frac{18.17.5}{5.21.17}=\frac{18}{21}=\frac{6}{7}\)

\(\frac{3.7.13.2}{13.7.7}=\frac{6}{7}\)

sorry bạn mik làm tắt

6/7 và 6/7 bằng nhau nha

\(\frac{36.85.20}{25.84.34}=\frac{2^2.3^2.5.17.2^2.5}{5^2.2^2.3.7.2.17}=\frac{2^4.3^2.5^2.17}{2^3.3.5^2.7.17}=\frac{6}{7}\)                           1

\(\frac{30.63.65.8}{117.200.49}=\frac{2.3.5.3^2.7.5.13.2^3}{3^2.13.2^3.5^2.7^2}=\frac{2^4.3^3.5^2.7.13}{2^3.3^2.5^2.7^2.13}=\frac{6}{7}\)                2

Từ 1 và hai suy ra \(\frac{6}{7}=\frac{6}{7}\)

Nên hai phép tính bằng nhau

ra:79125864.01

cứt

\(A=\frac{9^4.27^5.3^6.3^4}{3^8.814.234.8^2}=\frac{\left(3^2\right)^4.\left(3^3\right)^5.3^{10}}{3^8.2.407.2.3^2.13.\left(2^3\right)^2}=\frac{3^8.3^{15}.3^{10}}{2^8.3^{10}.13.407}=\frac{3^{23}}{2^8.13.407}\)