Zad. 1
[tex]A. \\\sqrt{\frac{64}{25}}=\frac85 \neq \frac8{25}- \text{nieprawdziwa}\\B. \\\sqrt{1.21}=\sqrt{1.1*1.1}=1.1 - \text{ prawdziwa} \\C. \\\sqrt{0.09}=\sqrt{0.3*0.3}=0.3 \neq 0.03 - \text{ nieprawdziwa}\\D.\\\sqrt{\frac{121}{625}}=\frac{11}{25} \neq \frac{11}{15} - \text{ nieprawdziwa}[/tex]
Zad. 2
[tex]A. \\\sqrt{1\frac{13}{36}}=\sqrt{\frac{49}{36}}=\frac{7}6 - \text{ wymierna }\\B. \\\sqrt[3]{6} - \text{ niewymierna }\\C. \\\sqrt{12}=\sqrt{4*3}=2\sqrt3 - \text{ niewymierna}\\D. \\\sqrt{2\frac34}=\sqrt{\frac{11}4}=\frac{\sqrt{11}}2 - \text{ niewymierna}[/tex]
Zad. 3
[tex]a) \sqrt{144}=\sqrt{12*12}=12\\b) \sqrt{81}=\sqrt{9*9}=9\\c) \sqrt{\frac1{16}}=\frac{1}{\sqrt{4*4}}=\frac14\\d) \sqrt{\frac{49}{121}}=\sqrt{\frac{7*7}{11*11}}=\frac7{11}\\e) \sqrt{0.04}=\sqrt{\frac4{100}}=\sqrt{2*2}{10*10}=\frac2{10}=0.2\\f) \sqrt{2.25}=\sqrt{2\frac14}=\sqrt{\frac94}=\sqrt{\frac{3*3}{2*2}}=\frac32=\frac{15}{10}=1.5[/tex]
