\(4^{30}=2^{2.30}=2^{30}.2^{30}=4^{15}.2^{30}\)

\(3.24^{10}=3.3^{10}.2^{30}=3^{11}.2^{30}\)

=> \(4^{30}>3.24^{10}\)

\(4\left(x-2\right)+10=5-3x\)

\(\Rightarrow4x-8+10=5-3x\)

\(\Rightarrow4x+3x=5-10+8\)

\(\Rightarrow7x=3\)

\(\Rightarrow x=\frac{3}{7}\)

\(4x-8-10=7-x\)

\(\Rightarrow4x+x=7+10+8\)

\(\Rightarrow5x=25\)

\(\Rightarrow x=5\)

\(\left|2x-1\right|=3\)

\(\Leftrightarrow\orbr{\begin{cases}2x-1=3\\2x-1=-3\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2\\x=-1\end{cases}}}\)

\(\left|1-2x\right|=5\)

\(\Leftrightarrow\orbr{\begin{cases}1-2x=5\\1-2x=-5\end{cases}\Leftrightarrow\orbr{\begin{cases}x=-2\\x=3\end{cases}}}\)

\(\left|4+x\right|=10\)

\(\Leftrightarrow\orbr{\begin{cases}4+x=10\\4+x=-10\end{cases}\Leftrightarrow\orbr{\begin{cases}x=6\\x=-14\end{cases}}}\)

Vì A có 200 thừa số nên thừa số cuối cũng sẽ là ( 200 - 200 )

Khi đó :

A = ( 200 - 1 ) ( 200 - 2 ) ... ( 200 - 200 )

A = ( 200 - 1 ) ( 200 - 1 ) ... 0

A = 0

Vậy A = 0

A=0 nha

_______________
_____________
hok tốt

x=2 y=-1

đúng không

= 1/2+ (1/2-1/3)+(1/3-1/4)+...+(1/99-1/100)

= 1/2 -1/100

= 49/100

ko chắc chắn, đúng k mk nha

thanks bạn

\(\frac{x}{3}=\frac{3}{x}\)

\(\Leftrightarrow9=x^2\)

\(\Leftrightarrow x=\sqrt{9}\)

\(\Leftrightarrow x\in\left\{-3;3\right\}\)

\(\frac{8}{5}=\frac{-12}{x}\)

\(\Leftrightarrow8x=-60\)

\(\Leftrightarrow x=\frac{-15}{2}\)

\(\frac{x}{-4}=\frac{-4}{x}\)

\(\Leftrightarrow-x^2=-16\)

\(\Leftrightarrow x^2=16\)

\(\Leftrightarrow x=\sqrt{16}\)

\(\Leftrightarrow x\in\left\{-4;4\right\}\)

câu 1 : x = 3

vì 3/3 cũng = 3/3

2/2 3/3 -6/-6 -9/-9 

50

câu này trg violympic sao bn?

k mk nhé

^^