[tex]t = \frac{2b}{a} \ \ /\cdot a\\\\t\cdot a = 2b \ \ /:t\\\\a = \frac{2b}{t}\\\\Odp. \ d)[/tex]
[tex]t = \frac{2b}{a} \ \ \ \ \ \ \ \ \ \ \ \ /\cdot a\\\\at = 2b\ \ \ \ \ \ \ \ /:t\\\\a = \boxed{\dfrac{2b}{t} }[/tex]
Odp: D.
