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How do you find all the values that make the expression undefined: #(9y + 8)/y#?

Answer 1

Basically you have that the value of #y# that makes your expression undefined is #y=0#. This is because if you try using this value you get a division by zero that cannot be performed (it is impossible to find a number solution of a division by zero!). All the other real #y# are ok.

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Answer 2

Kennedy Adams

The expression (9y + 8)/y is undefined when y = 0.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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