Question

X-3 ---- 2x -1 find the excluded value

Answer 1

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You mean $\dfrac{x-3}{2x-1}$, right?

So to find excluded value, you just set denominator equal to zero;

$2x-1 = 0$

From here, you just solve for x. Add both sides by 1 then divide both sides by 2, then you would have final answer;

$\boxed{x=\dfrac{1}{2}}$

So $\frac{1}{2}$ is your excluded value.