Răspuns:
b)x=4
Explicație pas cu pas:
b)
[tex] \frac{1}{2} \sqrt{4x} - \frac{1}{3} \sqrt{9x} + \frac{1}{5} \sqrt{25x} = 2 \\ \frac{1}{2} \times 2 \sqrt{x} - \frac{1}{3} \times 3 \sqrt{x} + \frac{1}{5} \times 5 \sqrt{x} = 2 \\ \sqrt{x} - \sqrt{x} + \sqrt{x} = 2 \\ \sqrt{x} = 2 \\ x = 4 \\ \frac{1}{2} \times \sqrt{4 \times 4} - \frac{1}{3} \times \sqrt{9 \times 4} + \frac{1}{5} \times \sqrt{25 \times 4 } = 2 \\ 2 = 2 \\ x = 4[/tex]
