Câu hỏi của ancutdi

Question

undefined giúp mình với ạ cả 4 câu càng nhanh càng tốt

Nguyễn Lê Phước Thịnh · Accepted Answer

$A=\dfrac{2^{13}\cdot3^7}{2^{15}\cdot3^2\cdot9^2}=\dfrac{2^{13}\cdot3^7}{2^{15}\cdot3^6}=\dfrac{3}{4}$

$C=27\cdot\left(-\dfrac{3}{2}\right)^{-5}\cdot\left(-\dfrac{2}{5}\right)^{-4}:\left(\dfrac{2}{125}\right)^{-1}$

$=27\cdot\dfrac{-32}{243}\cdot\dfrac{625}{16}\cdot\dfrac{2}{125}$

$=\dfrac{-32}{9}\cdot\dfrac{1}{8}\cdot5$

$=-\dfrac{20}{9}$

Câu trả lời:

$A=\dfrac{2^{13}\cdot3^7}{2^{15}\cdot3^2\cdot9^2}=\dfrac{2^{13}\cdot3^7}{2^{15}\cdot3^6}=\dfrac{3}{4}$

$C=27\cdot\left(-\dfrac{3}{2}\right)^{-5}\cdot\left(-\dfrac{2}{5}\right)^{-4}:\left(\dfrac{2}{125}\right)^{-1}$

$=27\cdot\dfrac{-32}{243}\cdot\dfrac{625}{16}\cdot\dfrac{2}{125}$

$=\dfrac{-32}{9}\cdot\dfrac{1}{8}\cdot5$

$=-\dfrac{20}{9}$