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kkunk266
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Mot vat dao dong dieu hoa voi chu ki T= 1s. Luc t= 2,5s vat di qua li do x=-5 [tex]\sqrt{2}[/tex] cm voi van toc v=-10[tex]\pi.\sqrt2[/tex]cm/s. Phuong trinh dao dong cua vat la?
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