Question

Determine the value(s) for which the rational expression −12d−1/10d+5 is undefined. If there's more than one value, list them separated by a comma, e.g. d=2,3.

Answer 1

Given rational expression is

`(-12d-1)/(10d+5)`

The given rational expression is undefined when

`\begin{gathered} 10d+5=0 \\ 10d=-5 \\ d=-(1)/(2) \end{gathered}`

Hence, the value of d for which the rational expression is undefined is 0.5