2 √17 – √ $\frac{16}{3}$ – √48 – √8 $\frac{1}{3}$ 02/08/2021 Bởi Eva 2 √17 – √ $\frac{16}{3}$ – √48 – √8 $\frac{1}{3}$
Đáp án: $\begin{array}{l}2\sqrt {27} – \sqrt {\frac{{16}}{3}} – \sqrt {48} – \sqrt {8\frac{1}{3}} \\ = 2\sqrt {{3^2}.3} – \frac{4}{{\sqrt 3 }} – \sqrt {{4^2}.3} – \sqrt {\frac{{25}}{3}} \\ = 2.3\sqrt 3 – \frac{{4\sqrt 3 }}{3} – 4\sqrt 3 – \frac{5}{{\sqrt 3 }}\\ = \sqrt 3 \left( {6 – \frac{4}{3} – 4 – \frac{5}{3}} \right)\\ = \sqrt 3 .\left( { – 1} \right)\\ = – \sqrt 3 \end{array}$ Bình luận
Đáp án:
$\begin{array}{l}
2\sqrt {27} – \sqrt {\frac{{16}}{3}} – \sqrt {48} – \sqrt {8\frac{1}{3}} \\
= 2\sqrt {{3^2}.3} – \frac{4}{{\sqrt 3 }} – \sqrt {{4^2}.3} – \sqrt {\frac{{25}}{3}} \\
= 2.3\sqrt 3 – \frac{{4\sqrt 3 }}{3} – 4\sqrt 3 – \frac{5}{{\sqrt 3 }}\\
= \sqrt 3 \left( {6 – \frac{4}{3} – 4 – \frac{5}{3}} \right)\\
= \sqrt 3 .\left( { – 1} \right)\\
= – \sqrt 3
\end{array}$