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Tính:\(\begin{array}{l}a)\,\,\sqrt {\frac{{289}}{{225}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b)\,\,\sqrt {2\frac{{14}}{{25}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,c)\,\,\sqrt {\...
Tính:\(\begin{array}{l}a)\,\,\sqrt {\frac{{289}}{{225}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b)\,\,\sqrt {2\frac{{14}}{{25}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,c)\,\,\sqrt {\...
Câu hỏi :
Tính:\(\begin{array}{l}a)\,\,\sqrt {\frac{{289}}{{225}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b)\,\,\sqrt {2\frac{{14}}{{25}}} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,c)\,\,\sqrt {\frac{{0,25}}{9}} \\d)\,\,\sqrt {1\frac{{9}}{16}.5\frac{4}{9}.0,01} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,e)\,\,\sqrt {\frac{{{{149}^2} - {{76}^2}}}{{{{457}^2} - {{384}^2}}}} \end{array}\)
A \(\begin{array}{l}
a)\,\,\,\frac{{27}}{{5}} & & & b)\,\,\frac{8}{5}\\
c)\,\,\frac{1}{6} & & & d)\,\,\frac{7}{{24}}\\
e)\,\,\frac{{15}}{{29}}
\end{array}\)
B \(\begin{array}{l}
a)\,\,\,\frac{{17}}{{15}} & & & b)\,\,\frac{8}{5}\\
c)\,\,\frac{1}{6} & & & d)\,\,\frac{17}{{4}}\\
e)\,\,\frac{{15}}{{29}}
\end{array}\)
C \(\begin{array}{l}
a)\,\,\,\frac{{17}}{{15}} & & & b)\,\,\frac{8}{5}\\
c)\,\,\frac{1}{6} & & & d)\,\,\frac{7}{{24}}\\
e)\,\,\frac{{25}}{{9}}
\end{array}\)
D \(\begin{array}{l}
a)\,\,\,\frac{{17}}{{15}} & & & b)\,\,\frac{8}{5}\\
c)\,\,\frac{1}{6} & & & d)\,\,\frac{7}{{24}}\\
e)\,\,\frac{{15}}{{29}}
\end{array}\)
* Đáp án
D
* Hướng dẫn giải
Phương pháp giải:
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Liên hệ giữa phép chia và phép khai phương
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