b) \(\left|x+3\right|+3=3\)
\(\Rightarrow\left|x+3\right|=3-3\)
\(\Rightarrow\left|x+3\right|=0\)
\(\Rightarrow x+3=0\)
\(\Rightarrow x=0-3\)
\(\Rightarrow x=-3\)
Vậy \(x=-3.\)
c) \(\left|x-1\right|-1,7=5,7\)
\(\Rightarrow\left|x-1\right|=5,7+1,7\)
\(\Rightarrow\left|x-1\right|=7,4\)
\(\Rightarrow\left[{}\begin{matrix}x-1=7,4\\x-1=-7,4\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=7,4+1\\x=\left(-7,4\right)+1\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=8,4\\x=-6,4\end{matrix}\right.\)
Vậy \(x\in\left\{8,4;-6,4\right\}.\)
d) \(2^{100}\) và \(10^{30}.\)
Ta có:
\(2^{100}=\left(2^{10}\right)^{10}=1024^{10}.\)
\(10^{30}=\left(10^3\right)^{10}=1000^{10}.\)
Vì \(1024>1000\) nên \(1024^{10}>1000^{10}.\)
\(\Rightarrow2^{100}>10^{30}.\)
Chúc bạn học tốt!
mai 8h phải đi hc r giúp me đi=))
