Question

am nevoie de ajutor la problema​

Answer 1

Răspuns:

d)  $a = \frac{1}{2}$

Explicație pas cu pas:

$a = (\frac{9}{2\sqrt{18} } - \frac{4}{3\sqrt{8} } - \frac{1}{4\sqrt{2} } ) : \frac{7}{6\sqrt{2} }$

$a = (\frac{9}{2*3\sqrt{2} } - \frac{4}{3*2\sqrt{2} } - \frac{1}{4\sqrt{2} } )*\frac{6\sqrt{2} }{7}$

$a = (\frac{3}{2\sqrt{2} } - \frac{2}{3\sqrt{2} } - \frac{1}{4\sqrt{2} } )*\frac{6\sqrt{2} }{7}$

$a = \frac{18 - 8 - 3}{12\sqrt{2} } * \frac{6\sqrt{2} }{7}$

$a = \frac{7*6\sqrt{2} }{12\sqrt{2} *7}$

$a = \frac{1}{2}$

Răspuns corect: d)