Bài giải

Ta có : 

\(\frac{2^{27}\cdot9^4}{6^9\cdot8^5}=\frac{2^{27}\cdot\left(3^2\right)^4}{\left(2\cdot3\right)^9\cdot\left(2^3\right)^5}=\frac{2^{27}\cdot3^8}{3^9\cdot2^9\cdot2^{15}}=\frac{2^{27}\cdot3^8}{3^9\cdot2^{24}}=\frac{2^{24}\cdot3^8\cdot2^3}{2^{24}\cdot3^8\cdot3}=\frac{2^3}{3}=\frac{8}{3}\)

                                                               Bài giải

Ta có : 

\(\frac{2^{27}\cdot9^4}{6^9\cdot8^5}=\frac{2^{27}\cdot\left(3^2\right)^4}{\left(2\cdot3\right)^9\cdot\left(2^3\right)^5}=\frac{2^{27}\cdot3^8}{3^9\cdot2^9\cdot2^{15}}=\frac{2^{27}\cdot3^8}{3^9\cdot2^{24}}=\frac{2^3}{3}=\frac{8}{3}\)

\(\frac{2^{27}.9^4}{6^9.8^5}=\frac{2^{27}.\left(3^2\right)^4}{\left(2.3\right)^9.\left(2^3\right)^5}=\frac{2^{27}.3^8}{2^9.3^9.2^{15}}=\frac{2^{27}.3^8}{2^{24}.3^9}=\frac{2^{27}}{2^{24}}.\frac{3^8}{3^9}=2^3.\frac{1}{3}=8.\frac{1}{3}=\frac{8}{3}\)

a) \(\dfrac{2^{14}.3^{12}}{6^{11}}\)

\(=\dfrac{2^2.2^{12}.3^{12}}{6^{11}}\)

\(=\dfrac{4.6^{12}}{6^{11}}\)

\(=4.6\)

\(=24\)

a) \(\dfrac{2^{14}.3^{12}}{6^{11}}=\dfrac{2^{14}.3^{12}}{2^{11}.3^{11}}=2^3.3\)

b) \(\dfrac{6^{18}}{9^9.8^5}=\dfrac{\left(2.3\right)^{18}}{\left(3^2\right)^8.\left(2^3\right)^5}\dfrac{2^{18}.3^{18}}{3^{18}.2^{15}}=2^3\)

a: \(\dfrac{2^{14}\cdot3^{12}}{6^{11}}=\dfrac{2^{14}\cdot3^{12}}{2^{11}\cdot3^{11}}=2^3\cdot3=24\)

b: \(\dfrac{6^{18}}{9^9\cdot8^5}=\dfrac{2^{18}\cdot3^{18}}{3^{18}\cdot2^{15}}=2^3\)

(9.8-12-5.12).(1+2+3+4+5)

=(72-12-60).(1+2+3+4+5)

=0.(1+2+3+4+5)

=0

(9.8-12-5.12).(1+2+3+4+5)

=( 70 - 70 ) . 15

= 0 . 15

=0

ko hiểu câu hỏi cho lắm bạn ạ 

\(\dfrac{5}{-4}.\dfrac{16}{25}+\dfrac{4}{-9}.\dfrac{8}{15}=-\dfrac{4}{5}+\left(-\dfrac{32}{135}\right)=-\dfrac{28}{27}\)

\(\dfrac{5}{-4}.\dfrac{16}{25}+\dfrac{4}{-9}.\dfrac{8}{15}=\dfrac{-4}{5}+\dfrac{-32}{135}=\dfrac{-28}{27}\)

môn văn được 7.4 đó bạn

tick nha. chúc bạn học tốt

điểm miệng sao lại có 9.8 ?? 9.8 có nghĩa là điểm 9 và điểm 8 hay là 9,8 bạn ơi

7.0 mk tính thế

a, X:100/999 + X:100=9,8

X:(100/999+100)=9,8

X;100000/999=9,8

X=9,8x10000/999

X=98000/999

b>x.2/3+x.5/2+x=1

x.(2/3+5/2+1)=1

x.25/2=1

x=6/25 Nhớ k nha

a> x.9,99+x:100=9.8

   x.9,99+x.0,01=9,8

    x.10,09=9.8

    x=980/1009