`823543^{3x+12}=(1/16807)^{2x+14}` nhanh ạ 19/07/2021 Bởi Skylar `823543^{3x+12}=(1/16807)^{2x+14}` nhanh ạ
ta có $823543^{3x+12}=(\dfrac{1}{16807})^{2x+14}$ =>$7(3x+12)=-5(2x+14)$ <=>$21x+84=-10x-70$ <=>$21x+10x=-84-70$ <=>$31x=-154$ =>$x=\dfrac{-154}{31}$ xin hay nhất Bình luận
`823543^{3x+12}=(1/16807)^{2x+14}` `⇔ 7(3x+12) = -5(2x+14)` `⇔ 21x + 84 = -10x – 70` `⇔ 21x = -10x – 154` `⇔ 31x = -154` `⇔ x = -154/31` Bình luận
ta có $823543^{3x+12}=(\dfrac{1}{16807})^{2x+14}$
=>$7(3x+12)=-5(2x+14)$
<=>$21x+84=-10x-70$
<=>$21x+10x=-84-70$
<=>$31x=-154$
=>$x=\dfrac{-154}{31}$
xin hay nhất
`823543^{3x+12}=(1/16807)^{2x+14}`
`⇔ 7(3x+12) = -5(2x+14)`
`⇔ 21x + 84 = -10x – 70`
`⇔ 21x = -10x – 154`
`⇔ 31x = -154`
`⇔ x = -154/31`