\(\frac{\left|x\right|}{186}=\left(1-\frac{303030}{313131}\right)+\left(\frac{616161}{626262}-1\right)+\left(\frac{929291}{939393}-1\right)\)

<=> \(\frac{\left|x\right|}{186}=-\frac{303030}{313131}+\frac{616161}{626262}+\frac{929292}{939393}+1-1-1\)

<=> \(\frac{\left|x\right|}{186}=-\frac{30}{31}+\frac{61}{62}+\frac{92}{93}+1-1-1\)

<=> \(\frac{\left|x\right|}{186}=\frac{61}{62}+\frac{92}{93}-1-\frac{30}{31}\)

<=> \(\frac{\left|x\right|}{186}=-\frac{1.31}{31}+\frac{61}{62}+\frac{92}{91}-\frac{30}{31}\)

Lấy MSC là 168, ta có:

<=> \(\frac{\left|x\right|}{186}=\frac{-186}{186}+\frac{183}{186}+\frac{184}{186}-\frac{180}{186}\)

<=> \(\frac{\left|x\right|}{186}=\frac{-186+183+184-180}{186}\)

<=> \(\frac{\left|x\right|}{186}=\frac{1}{186}\)

<=> |x| = 1

<=> \(\orbr{\begin{cases}x=1\\x=-1\end{cases}}\)

=> \(\orbr{\begin{cases}x=1\\x=-1\end{cases}}\)

x/186 = (1 - 303030/313131) + (616161/626262 - 1) + (929292/939393 - 1)

x/186 = 1 - 30/31 + 61/62 - 1 + 92/93 - 1

x/186 = 61/62 - 30/31 + 92/93 - 1

x/186 = 1/62 - 1/93

x/186 = 1/186

x = 1

0,64 %

161616/252525 = 0,64%

0,64%

=10 nha Thu Hiền

(161616/212121+2022/3033)*7

=10

mk nhanh nhất nha

Đ/s: 10 nhé bạn.