Question

A = \(\sqrt{\frac{1}{9}+\frac{1}{16}}\)

B = \(\sqrt{4+36+81}\)

C = \(\sqrt{1^{3^{ }}+}2^3\)

E = \(\left(\sqrt{\frac{1}{9}+\sqrt{\frac{25}{36}-\sqrt{\frac{49}{81}}:}\sqrt{\frac{441}{324}}}\right)\)

F = \(-4.\sqrt{\frac{1}{16}+3.\sqrt{\frac{1}{9}}-}5.\sqrt{0,04}\)

Mg các bạn giúp mik ạ

Cảm ơn ạ

Answer 1

\(\sqrt{\frac{1}{9}+\frac{1}{16}}\)

\(=\frac{1}{3}+\frac{1}{4}\)

\(=\frac{7}{12}\)

Answer 2

\(\sqrt{4+36+81}\)

\(=\sqrt{121}\)

\(=\pm11\)

Answer 3

\(\sqrt{1^3}+2^3\)

\(=\sqrt{1}+8\)

\(=1+8\)

\(=9\)

Answer 4

\(\sqrt{\frac{1}{9}+\sqrt{\frac{25}{36}-\sqrt{\frac{49}{81}}}:\sqrt{\frac{441}{324}}}\)

\(=\sqrt{\frac{1}{9}+\sqrt{\frac{25}{36}-\frac{7}{9}}:\frac{21}{18}}\)

\(=\sqrt{\frac{1}{9}+\sqrt{\frac{-1}{12}}:\frac{21}{18}}\)

Vì không tồn tại \(\sqrt{\frac{-1}{12}}\) nên E không nhận giá trị nào cả

Mình cũng bấm máy tính rồi nhưng nó cũng giống mình :

Answer 5

\(-4.\sqrt{\frac{1}{16}+3.\sqrt{\frac{1}{9}}}-5.\sqrt{0,04}\)

\(=-4.\sqrt{\frac{1}{16}+3.\frac{1}{3}}-5.\sqrt{\frac{4}{100}}\)

\(=-4.\sqrt{\frac{1}{16}+1}-5.\frac{2}{10}\)

\(=-4.\sqrt{\frac{17}{16}}-1\)

\(=-\left(4.\sqrt{\frac{17}{16}}\right)-1\)

\(=-\left(2^2.\sqrt{\frac{17}{16}}\right)-1\)

\(=-\left(\sqrt{\frac{17}{8}}\right)-1\)