\(\frac{45^{10}.5^{10}}{75^{40}}\)
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từ đề bài ta có
\(\frac{45^5\cdot5^{10}}{75^5}=\frac{\left(15\cdot3\right)^5\cdot5^{10}}{\left(15\cdot5\right)^5}=\frac{15^5\cdot3^5\cdot5^{10}}{15^5\cdot5^5}=\frac{3^5\cdot5^5}{1}=15^5=759375\)
a ) \(\left(-\frac{40}{52}.0,32.\frac{17}{20}\right):\frac{64}{75}\)
= \(\left(-\frac{16}{65}.\frac{17}{20}\right):\frac{64}{75}\)
= \(\left(-\frac{68}{325}\right):\frac{64}{75}\)
= \(\frac{-51}{208}\)
b ) \(-\frac{10}{11}.\frac{8}{9}+\frac{7}{18}.\frac{10}{11}\)
= \(\frac{10}{11}.\left(-\frac{8}{9}+\frac{7}{18}\right)\)
= \(\frac{10}{11}.\left(-\frac{1}{2}\right)\)
= \(\frac{-5}{11}\)
c ) \(\frac{45^{10}.5^{20}}{75^{15}}\)
= \(\frac{5^{10}.3^{20}.5^{20}}{5^{30}.3^{15}}\)
= \(\frac{5^{30}.3^{20}}{5^{30}.3^{15}}\)
= 3 5
= 243
d ) ( - 0,125 ) 3 . 80 4
= -80000
Ta có : \(\frac{45^{10}.5^{20}}{75^{15}}=\frac{9^{10}.5^{10}.5^{20}}{3^{15}.25^{15}}=\frac{\left(3^2\right)^{10}.5^{30}}{3^{15}.\left(5^2\right)^{15}}=\frac{3^{20}.5^{30}}{3^{15}.5^{30}}=3^5\)
\(\frac{45^{10}.5^{20}}{75^{15}}=\frac{3^{20}.5^{10}.5^{20}}{3^{15}.5^{30}}=\frac{3^{20}.5^{30}}{3^{15}.5^{30}}=3^5=243\)
.Check mk nhá •<3 •
\(\frac{45^{10}.5^{10}}{75^{40}}=\frac{\left(5.3^2\right)^{10}.5^{10}}{\left(5^2.3\right)^{40}}=\frac{5^{10}.3^{20}.5^{10}}{5^{80}.3^{40}}=\frac{1}{5^{60}.3^{20}}\)