SOLUTION: f(y)= y+7 / y^2-7y what's the domain?

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Question 677312: f(y)= y+7 / y^2-7y
what's the domain?

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You can't divide by zero.

So y^2 - 7y can't be zero

if it were, then

y^2 - 7y = 0

y(y - 7) = 0

y = 0 or y-7 = 0

y = 0 or y = 7

So if y = 0 or y = 7, then the denominator is zero.

So we must exclude these values from the domain.

Answer:

Domain: The set of all real numbers but y can't be equal to 0 or y can't be equal to 7.