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\(\frac{16.29-32}{16.37+32}\)
\(=\frac{16.29-16.2}{16.37+16.2}\)
\(=\frac{16\left(29-2\right)}{16\left(37+2\right)}\)
\(=\frac{16.27}{16.39}\)
\(=\frac{27}{39}=\frac{9}{13}\)
\(y=\frac{16.29-32}{16.37+32}=\frac{9}{13}\)
vậy y = \(\frac{9}{13}\)
t i ck nha!! 6546576876876976
\(=\dfrac{16\cdot30-30-16}{16\cdot37+16\cdot2}=\dfrac{30\left(16-1\right)-16}{16\cdot39}\)
\(=\dfrac{30\cdot15-16}{16\cdot39}=\dfrac{434}{16\cdot39}=\dfrac{217}{312}\)
a) \(\frac{3^2.2^4}{8.3^2}=\frac{3^2.2^4}{2^3.3^2}=2\)
b)\(\frac{84.45}{49.54}=\frac{2^2.7.3^3.5}{7^2.2.3^3}=\frac{10}{7}\)
c) \(\frac{36.10.21}{2^3.63.35}=\frac{2^3.3^3.5.7}{2^3.3^2.5.7^2}=\frac{3}{7}\)
d) \(\frac{16.29-32}{16.37+32}=\frac{16.29-16.2}{16.37+2.16}=\frac{16.\left(29-2\right)}{16.\left(37+2\right)}=\frac{27}{39}=\frac{9}{13}\)
Số đó là:
\(32:\frac{4}{32}\)
\(=\frac{4.5.32}{4}\)
\(=5.32=160\)
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=\frac{24}{8}+\frac{3}{8}=\frac{27}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{1}{2}=\frac{29}{16}+\frac{8}{16}=\frac{29+8}{16}=\frac{37}{16}\)
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=3\frac{3}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{8}{16}=\frac{37}{16}\)
\(a)\frac{x}{8}=\frac{-30}{y}=\frac{-48}{32}\)
Rút gọn : \(\frac{-48}{32}=\frac{(-48):16}{32:16}=\frac{-3}{2}\)
* Ta có : \(\frac{x}{8}=\frac{-3}{2}\)
\(\Rightarrow x\cdot2=-3\cdot8\)
\(\Rightarrow x=\frac{-3\cdot8}{2}=-12\)
* Ta có : \(\frac{-30}{y}=\frac{-3}{2}\)
\(\Rightarrow-30\cdot2=-3\cdot y\)
\(\Rightarrow y=\frac{-30\cdot2}{-3}=20\)
Mấy bài kia làm tương tự
\(32⋮\left(n-1\right)\)
\(\Rightarrow\left(n-1\right)\inƯ\left(32\right)=\left\{\pm1;\pm2;\pm4;\pm8;\pm\pm16;\pm32\right\}\)
\(\Rightarrow\orbr{\begin{cases}x-1=1\\x-1=-1\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2\\x=0\end{cases}}}\)
\(\Rightarrow\orbr{\begin{cases}x-1=2\\x-1=-2\end{cases}\Leftrightarrow\orbr{\begin{cases}x=3\\x=-1\end{cases}}}\)
\(\Rightarrow\orbr{\begin{cases}x-1=4\\x-1=-4\end{cases}\Leftrightarrow\orbr{\begin{cases}x=5\\x=-3\end{cases}}}\)
\(\Rightarrow\orbr{\begin{cases}x-1=8\\x-1=-8\end{cases}\Leftrightarrow\orbr{\begin{cases}x=9\\x=-7\end{cases}}}\)
\(\Rightarrow\orbr{\begin{cases}x-1=16\\x-1=-16\end{cases}\Leftrightarrow\orbr{\begin{cases}x=17\\x=-15\end{cases}}}\)
\(\Rightarrow\orbr{\begin{cases}x-1=32\\x-1=-32\end{cases}\Leftrightarrow\orbr{\begin{cases}x=33\\x=-31\end{cases}}}\)
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