Tìm ƯCLN(1,16)
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a) ƯCLN(1,16) = 1.
b) 8 = 23; 20 = 22.5
=> ƯCLN(8, 20) = 22 = 4.
c) 84 = 22. 3.7; 156 = 22.3.13
=> ƯCLN(84, 156) = 22.3 = 12.
d) 16 = 24; 40 = 23.5; 176 = 24.11
=> ƯCLN(16, 40, 176) = 23 = 8.
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\(\left(1,16-x\right).\frac{\frac{21}{4}}{7}=0,75\)
\(\left(1,16-x\right).0,75=0,75\)
\(1,16-x=0,75:0,75\)
\(1,16-x=1\)
\(x=1,16-1\)
\(x=0,16\)
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\(a,\Rightarrow\left|x\right|=4+1,16=5,16\Rightarrow\left[{}\begin{matrix}x=5,16\\x=-5,16\end{matrix}\right.\\ b,\Rightarrow\left(3x-2\right)^3=\left(-\dfrac{5}{2}\right)^3\\ \Rightarrow3x-2=-\dfrac{5}{2}\\ \Rightarrow3x=-\dfrac{5}{2}+2=-\dfrac{1}{2}\\ \Rightarrow x=-\dfrac{1}{2}:3=-\dfrac{1}{6}\)
a)lxl - 1,16=4
lxl=4+1,16
lxl=5,16
=>x thuộc ( 5,16 ; -5,16)
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Ta có :
\(1=1\)
\(16=2^4\)
\(\RightarrowƯCLN\left(1;16\right)=1\)
Ta có :
1 = 1
16 = 24
⇒ ƯCLN (1; 16) = 1