\(\dfrac{8^{15}.25^7}{125^5.2^{47}}\)
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\(C=\dfrac{2^6\cdot3^{10}}{3^9\cdot2^6}=3\\ D=\dfrac{3^{24}\cdot3^{10}}{3^{21}\cdot3^{11}}=\dfrac{3^{34}}{3^{32}}=3^2=9\\ F=\dfrac{2^{45}\cdot5^{14}}{5^{15}\cdot2^{47}}=\dfrac{1}{2^2\cdot5}=\dfrac{1}{20}\\ G=\dfrac{2^2\cdot5^2\cdot5^3}{2^3\cdot5^4}=\dfrac{1\cdot5}{2}=\dfrac{5}{2}\)
C=3
D=9
F=1/20
G=5/2
Em ko giải chi tiết vì nó lâu
Mong thông cảm!
\(1\dfrac{13}{15}.0,75-\left(\dfrac{8}{15}+25\%\right).\dfrac{24}{47}-3\dfrac{12}{13}:3\)
\(=\dfrac{28}{15}.\dfrac{3}{4}-\left(\dfrac{8}{15}+\dfrac{1}{4}\right).\dfrac{24}{47}-\dfrac{51}{13}:3\)
\(=\dfrac{7}{5}-\dfrac{47}{60}.\dfrac{24}{47}-\dfrac{17}{13}\)
\(=\dfrac{7}{5}-\dfrac{2}{5}-\dfrac{17}{13}\)
\(=1-\dfrac{17}{13}=-\dfrac{4}{13}\)
125/90=25/18
84/91=12/13
75/45=25/15=5/3
6/7=18/21=54/63=104/126
13 . ( - 7 ) = - 91
( - 8 ) . ( - 25 ) = 200
25 . ( - 47 ) . ( - 4 ) = ( - 100 ) . ( - 47 ) = 4700
8 . ( 125 - 3000 ) = 8 . 125 - 3000 = 1000 - 3000 = - 2000
512 . ( 2 - 128 ) - 128 . ( - 512 ) = 512 . ( 2 - 128 + 128 ) = 512 . 2 = 1024
13 x (-7) = -91
(-8) x (-25) = 200
25 x (-47) x (-4) = 4700
8 x (125 - 3000) = -23000
512 x (2 - 128) - 128 x (-512) = 1024
Nếu sai thì thôi
Học tốt!!!
8^15 . 25^7 (2^3) ^ 15 . (5^2) ^ 7 2^45. 5^17 5^2 25
________________ = ___________________ = ________________ = ___ = _____
125^5 . 2^47 (5^3) ^5 . 2^47 5^15 . 2^47 2^2 4
\(\frac{8^{15}\cdot25^7}{125^5\cdot2^{47}}=\frac{\left(2^3\right)^{15}\cdot\left(5^2\right)^7}{\left(5^3\right)^5\cdot2^{47}}=\frac{2^{45}\cdot5^{14}}{5^{15}\cdot2^{47}}=\frac{1\cdot1}{5\cdot2^2}=\frac{1}{5\cdot4}=\frac{1}{20}\)
\(\dfrac{8^{15}.25^7}{125^5.2^{47}}=\dfrac{\left(2^3\right)^{15}.\left(5^2\right)^7}{\left(5^3\right)^5.2^{47}}=\dfrac{2^{45}.5^{14}}{5^{15}.2^{47}}\)
\(\dfrac{2^{45}.5^{14}}{2^{47}.5^{15}}=\dfrac{1.1}{4.5}=\dfrac{1}{20}\)
Thanks bạn nhiều nha