rút gọn biểu thức A=3.5.7+9.15.21+12.20.28\2.4.6+6.12.18+8.16.24 22/09/2021 Bởi Ariana rút gọn biểu thức A=3.5.7+9.15.21+12.20.28\2.4.6+6.12.18+8.16.24
$\begin{array}{l}\quad\dfrac{3.5.7+9.15.21+12.20.28}{2.4.6+6.12.18+8.16.24}\\=\dfrac{3.5.7+3.3.5.3.7.3+4.3.4.5.4.7}{2.4.6+3.2.3.4.3.6+4.2.4.4.4.6}\\=\dfrac{3.5.7.(1+3.3.3+4.4.4)}{2.4.6.(1+3.3.3+4.4.4)}\\=\dfrac{3.5.7}{2.4.6}\\=\dfrac{105}{48}\\=\dfrac{35}{16} \end{array}$ Bình luận
A=3.5.7+9.15.21+12.20.28\2.4.6+6.12.18+8.16.24 A=105+2835+6720\48+1396+256 A=9660/1700 A=483/85 Chúc bn hok tốt Bình luận
$\begin{array}{l}\quad\dfrac{3.5.7+9.15.21+12.20.28}{2.4.6+6.12.18+8.16.24}\\=\dfrac{3.5.7+3.3.5.3.7.3+4.3.4.5.4.7}{2.4.6+3.2.3.4.3.6+4.2.4.4.4.6}\\=\dfrac{3.5.7.(1+3.3.3+4.4.4)}{2.4.6.(1+3.3.3+4.4.4)}\\=\dfrac{3.5.7}{2.4.6}\\=\dfrac{105}{48}\\=\dfrac{35}{16} \end{array}$
A=3.5.7+9.15.21+12.20.28\2.4.6+6.12.18+8.16.24
A=105+2835+6720\48+1396+256
A=9660/1700
A=483/85
Chúc bn hok tốt