giải thích ra hộ mình với ạ.Mình cảm ơn
Câu 3:
\(\dfrac{25^3\cdot5^5}{50^{10}}=\dfrac{5^6\cdot5^5}{\left(5^2\cdot2\right)^{10}}=\dfrac{5^{11}}{5^{20}\cdot2^{10}}=\dfrac{1}{5^9\cdot2^{10}}\)
=>Không có câu nào đúng
Câu 4:
\(A=125\cdot2^3-\left(\left(8,51+4\cdot\left(\dfrac{3}{4}-\dfrac{2}{5}\right)^2\right)\right)+1^{2022}\)
\(=125\cdot8+1-\left[8,51+4\cdot\left(\dfrac{15-8}{20}\right)^2\right]\)
\(=1000+1-\left[8,51+4\cdot\dfrac{49}{400}\right]\)
\(=1001-9=992\)
=>Chọn D
Câu 3:
\(\dfrac{25^3\cdot5^5}{50^{10}}=\dfrac{5^6\cdot5^5}{\left(5^2\cdot2\right)^{10}}=\dfrac{5^{11}}{5^{20}\cdot2^{10}}=\dfrac{1}{5^9\cdot2^{10}}\)
=>Không có câu nào đúng
Câu 4:
\(A=125\cdot2^3-\left(\left(8,51+4\cdot\left(\dfrac{3}{4}-\dfrac{2}{5}\right)^2\right)\right)+1^{2022}\)
\(=125\cdot8+1-\left[8,51+4\cdot\left(\dfrac{15-8}{20}\right)^2\right]\)
\(=1000+1-\left[8,51+4\cdot\dfrac{49}{400}\right]\)
\(=1001-9=992\)
=>Chọn D
