Question

Va rog!!am nevoie urgent...rezolvarea completă daca se poate​

Answer 1

Explicație pas cu pas:

$x = \left( \frac{2}{ \sqrt{2} } + \frac{18}{ \sqrt{18}} - \frac{8}{ \sqrt{8} } \right) \div \frac{ \sqrt{2} }{2} \\= \left( \frac{2}{ \sqrt{2} } + \frac{18}{ 3\sqrt{2}} - \frac{8}{2 \sqrt{2} } \right) \times \frac{2}{ \sqrt{2} } \\= \left( \frac{2}{ \sqrt{2} } + \frac{6}{ \sqrt{2}} - \frac{4}{ \sqrt{2} } \right) \times \frac{2}{ \sqrt{2} } \\= \frac{2 + 6 - 4}{ \sqrt{2} } \times \frac{2}{ \sqrt{2} } = \frac{4}{ \sqrt{2} } \times \frac{2}{ \sqrt{2} } \\= \frac{8}{2} = 4$

inversul lui x este:

$\frac{1}{x} = \frac{1}{4}$

Answer 2

Răspuns:

Explicație pas cu pas:

x = (2/√2 + 18/3√2- 8/2√2): √2/2

desfiinmtam paranteza

x= 2/√2 : √2/2 + 18/3√2: √2/2 - 8/2√2:√2/2

x= 2/√2 × 2/√2+ 18/3√2×2/√2 -8/2√2×2/√2

x= 4/2 + 36/ (3×2) - 16/(2×2)

x=2+ 36/6 -16/4

x=2+6 -4

x= 8-4

x=4

inversa este 1/4