How many roots does the equation $x - \frac{2}{x - 1} = 1 - \frac{2}{x - 1}$ have?

Solve the given two equations and choose the correct answer from the given options.
$I.$ $x^{2} = 729$
$II.$ $y = \sqrt{729}$

$A$ man who swims $48 \, m/min$ in still water,swims $200 \, m$ against the current and $200 \, m$ with the current. The difference between the time taken by him against the stream and with the stream is $10 \, minutes.$
$Quantity \, 1$: Speed of current.
$Quantity \, 2$: Speed of a man who completes $3$ rounds of a circular path of radius $49 \, m$ in $14 \, minutes.$

If $x$ is real,the maximum value of $\frac{3x^2 + 9x + 17}{3x^2 + 9x + 7}$ is

The expression $x^2 + 2bx + c$ has a positive value for all real $x$ if:

The value of $2 + \frac{1}{2 + \frac{1}{2 + \dots \infty}}$ is