Question

2 si 3 Cine raspunde cel mai rapid primeste coroana​

Answer 1

Răspuns:

3.

a)rad25/16=5/4

b)rad81/25=9/5

c)rad49/36=7/6

d)8/15

e)12/45=4/15

f)19/567

Answer 2

3.

a) $\it \sqrt{1 \frac{9}{16} } = \sqrt{\frac{25}{16} } = \frac{\sqrt{25} }{\sqrt{16} } = \frac{5}{4}$

b) $\it \sqrt{3 \frac{6}{25} } = \sqrt{\frac{81}{25} } = \frac{\sqrt{81} }{\sqrt{25} }  = \frac{9}{5}$

c) $\it \sqrt{1 \frac{13}{36} } = \sqrt{\frac{49}{36} } = \frac{\sqrt{49} }{\sqrt{36} } = \frac{7}{6}$

d) $\it \sqrt{\frac{64}{3^{2} \cdot 25} } = \frac{8}{3 \cdot 5} = \frac{8}{15}$

e) $\it \sqrt{\frac{144}{3^{3} \cdot 75} } = \frac{12}{3\sqrt{3} \cdot 5\sqrt{3} }  = \frac{12}{15 \cdot 3}  = \frac{12}{45}^{(3} = \frac{4}{15}$

f) $\it \sqrt{\frac{361}{7^{2} \cdot 9^{4} } } = \frac{19}{7 \cdot 9^{2} } = \frac{19}{7 \cdot 81} = \frac{19}{567}$